diff --git a/CHANGELOG.md b/CHANGELOG.md
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+# Changelog
+
+All notable changes to Yorkie will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and CodePair adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.2] - 2024-08-14
+
+### Added
+
+- Add Document Writing Intelligence by @devleejb in https://github.com/yorkie-team/codepair/pull/289
+
+### Changed
+
+- Add .gitignore into root project directory by @sihyeong671 in https://github.com/yorkie-team/codepair/pull/280
+- Change model from `gpt-3.5-turbo` to `gpt-4o-mini` by @devleejb in https://github.com/yorkie-team/codepair/pull/291
+
+## [0.1.1] - 2024-08-12
+
+### Added
+
+- Add shortcut for text formatting and FormatBar component by @beberiche in https://github.com/yorkie-team/codepair/pull/263
+- Add notifications when there is an error in the service by @wet6123 in https://github.com/yorkie-team/codepair/pull/264
+- Implement navigate to 404 error page when accessing non-existent URL in workspaceSlug by @KimKyuHoi in https://github.com/yorkie-team/codepair/pull/244
+- Add description for tag system in `CONTIRBUTING.md` by @devleejb in https://github.com/yorkie-team/codepair/pull/271
+- Add pre-commit hook using husky for linting and formatting by @choidabom in https://github.com/yorkie-team/codepair/pull/281
+
+### Changed
+
+- Change slug usage to encoded text by @minai621 in https://github.com/yorkie-team/codepair/pull/261
+- Bump JamesIves/github-pages-deploy-action from 4.6.1 to 4.6.3 by @dependabot in https://github.com/yorkie-team/codepair/pull/262
+- Change `encodeURIComponent` to `encodeURI` by @devleejb in https://github.com/yorkie-team/codepair/pull/265
+- Remove unnecessary package-lock.json file by @choidabom in https://github.com/yorkie-team/codepair/pull/277
+- Update GitHub Actions to trigger when a new version is released by @devleejb in https://github.com/yorkie-team/codepair/pull/283
+
+### Fixed
+
+- Fix Checking Conflict in Note Creation by @devleejb in https://github.com/yorkie-team/codepair/pull/266
+- Fix 'Additional Users' Popover Display Logic for Profile Clicks by @choidabom in https://github.com/yorkie-team/codepair/pull/270
+
+## [0.1.0] - 2024-08-01
+
+### Added
+
+- Initialize frontend project by @devleejb in https://github.com/yorkie-team/codepair/pull/37
+- (FE) Add document editing with Yorkie by @devleejb in https://github.com/yorkie-team/codepair/pull/38
+- Add document creation logic by @devleejb in https://github.com/yorkie-team/codepair/pull/39
+- Add GitHub page actions by @devleejb in https://github.com/yorkie-team/codepair/pull/40
+- Add the base path to header by @devleejb in https://github.com/yorkie-team/codepair/pull/42
+- GitHub page not working although the deployment is completed by @devleejb in https://github.com/yorkie-team/codepair/pull/43
+- Backend configuration by @devleejb in https://github.com/yorkie-team/codepair/pull/44
+- Database Implementation by @devleejb in https://github.com/yorkie-team/codepair/pull/45
+- Support MongoDB by @devleejb in https://github.com/yorkie-team/codepair/pull/49
+- (BE) User registration / login by @devleejb in https://github.com/yorkie-team/codepair/pull/51
+- (BE) Implement workspace creation logic by @devleejb in https://github.com/yorkie-team/codepair/pull/53
+- (BE) Add API for Retrieving a Workspace by @devleejb in https://github.com/yorkie-team/codepair/pull/58
+- (BE) Add API for Retrieving Workspace List by @devleejb in https://github.com/yorkie-team/codepair/pull/59
+- (BE) Add API for Retrieving Workspace Members by @devleejb in https://github.com/yorkie-team/codepair/pull/60
+- (BE) Add API for Creating a Document in Workspace by @devleejb in https://github.com/yorkie-team/codepair/pull/61
+- Add API for Retrieving a Document in the Workspace by @devleejb in https://github.com/yorkie-team/codepair/pull/62
+- (BE) Add API for Retrieving the Document List in the Workspace by @devleejb in https://github.com/yorkie-team/codepair/pull/63
+- (BE) Add API for Workspace Invitation by @devleejb in https://github.com/yorkie-team/codepair/pull/64
+- (BE) Add API for Document Sharing by @devleejb in https://github.com/yorkie-team/codepair/pull/65
+- (BE) Add API for Retrieving a User by @devleejb in https://github.com/yorkie-team/codepair/pull/68
+- (FE) Add User registration / Login by @devleejb in https://github.com/yorkie-team/codepair/pull/69
+- (FE) Add Retrieving a User Information by @devleejb in https://github.com/yorkie-team/codepair/pull/70
+- (FE) Add Logout by @devleejb in https://github.com/yorkie-team/codepair/pull/71
+- (FE) Add Retrieving a Workspace by @devleejb in https://github.com/yorkie-team/codepair/pull/73
+- (FE) Add Retrieve Workspace List by @devleejb in https://github.com/yorkie-team/codepair/pull/74
+- (BE) Generate slug for workspace and document by @devleejb in https://github.com/yorkie-team/codepair/pull/78
+- (BE) Generate Share and Invitation token by @devleejb in https://github.com/yorkie-team/codepair/pull/79
+- (FE) Retrieve Document List within Workspace by @devleejb in https://github.com/yorkie-team/codepair/pull/80
+- (FE) Document Creation within Workspace Document Name by @devleejb in https://github.com/yorkie-team/codepair/pull/81
+- (FE) Workspace Creation by @devleejb in https://github.com/yorkie-team/codepair/pull/82
+- (FE) Add retrieve a Document by @devleejb in https://github.com/yorkie-team/codepair/pull/83
+- (FE) Retrieve Workspace Members by @devleejb in https://github.com/yorkie-team/codepair/pull/84
+- (FE) Add Global Error Handling by @devleejb in https://github.com/yorkie-team/codepair/pull/86
+- (FE) Add Workspace Invitation by @devleejb in https://github.com/yorkie-team/codepair/pull/87
+- (FE) Add Document Sharing by @devleejb in https://github.com/yorkie-team/codepair/pull/89
+- (FE) Add Presence to Editor Header by @devleejb in https://github.com/yorkie-team/codepair/pull/90
+- (BE) Dockerize the Backend by @devleejb in https://github.com/yorkie-team/codepair/pull/94
+- (FE) Wrong Presence Information by @devleejb in https://github.com/yorkie-team/codepair/pull/96
+- Fix Typo in Environment by @devleejb in https://github.com/yorkie-team/codepair/pull/97
+- (FE) Apply URL Spec by @devleejb in https://github.com/yorkie-team/codepair/pull/98
+- (BE) Retrieve `lastChangedAt` from Yorkie Server by @devleejb in https://github.com/yorkie-team/codepair/pull/101
+- (FE) Incorrect Integration of CodeMirror and Yorkie Resulting in Document Synchronization by @devleejb in https://github.com/yorkie-team/codepair/pull/102
+- Add GitHub Actions for Publish Docker Image by @devleejb in https://github.com/yorkie-team/codepair/pull/103
+- (FE) Refactor `react-query` and `redux` by @devleejb in https://github.com/yorkie-team/codepair/pull/104
+- (BE) Error handling for fetch document by @devleejb in https://github.com/yorkie-team/codepair/pull/105
+- (BE) Add Auth Webhook for Document Key Access Verification by @devleejb in https://github.com/yorkie-team/codepair/pull/106
+- Fix `remoteSelection` to Update Remote Decoration at Once by @devleejb in https://github.com/yorkie-team/codepair/pull/115
+- AI Project Configuration by @devleejb in https://github.com/yorkie-team/codepair/pull/116
+- Add Migration Scripts by @devleejb in https://github.com/yorkie-team/codepair/pull/117
+- (AI) AI Project Configuration OpenAI, Framework, LangChain LangSmith by @devleejb in https://github.com/yorkie-team/codepair/pull/119
+- (AI) LLM Yorkie Intelligence Development (GitHub Issue Writing, PR Writing, Additional Question Function) by @devleejb in https://github.com/yorkie-team/codepair/pull/120
+- Synchronization Issue when Multiple Users are Editing the Document in the Editor by @devleejb in https://github.com/yorkie-team/codepair/pull/121
+- Fix RemoteSelection Infinite Updating by @devleejb in https://github.com/yorkie-team/codepair/pull/122
+- (FE) Implement CodePair AI Assistant by @devleejb in https://github.com/yorkie-team/codepair/pull/123
+- Bump actions/checkout from 2 to 4 by @dependabot in https://github.com/yorkie-team/codepair/pull/126
+- Bump JamesIves/github-pages-deploy-action from 4.1.0 to 4.5.0 by @dependabot in https://github.com/yorkie-team/codepair/pull/125
+- Bump actions/setup-node from 1 to 4 by @dependabot in https://github.com/yorkie-team/codepair/pull/124
+- Implement `documents.service.spec.ts` by @devleejb in https://github.com/yorkie-team/codepair/pull/128
+- Change Yorkie Project Public Key by @devleejb in https://github.com/yorkie-team/codepair/pull/127
+- Update `README.md` by @devleejb in https://github.com/yorkie-team/codepair/pull/130
+- Add Frontend & Backend `README.md` by @devleejb in https://github.com/yorkie-team/codepair/pull/131
+- Remove Admin API used for Data Migration by @devleejb in https://github.com/yorkie-team/codepair/pull/151
+- Add Design Document for AuthWebhook Design by @devleejb in https://github.com/yorkie-team/codepair/pull/152
+- Add Frontend Sentry & Google Analytics by @devleejb in https://github.com/yorkie-team/codepair/pull/153
+- Add Backend Architecture Documentation by @devleejb in https://github.com/yorkie-team/codepair/pull/154
+- Fix typo by @hackerwins in https://github.com/yorkie-team/codepair/pull/155
+- Add documentation for using Redux and React Query as state management tools by @devleejb in https://github.com/yorkie-team/codepair/pull/156
+- Add ability to attach images in the editor by @devleejb in https://github.com/yorkie-team/codepair/pull/157
+- Add left-right panel scroll sync in markdown edit/preview mode by @devleejb in https://github.com/yorkie-team/codepair/pull/166
+- Add support for KaTex in Markdown Preview by @devleejb in https://github.com/yorkie-team/codepair/pull/167
+- Update Markdown Preview to Open URLs in New Tab by @devleejb in https://github.com/yorkie-team/codepair/pull/168
+- Fix Excessive display of presence in the application by @devleejb in https://github.com/yorkie-team/codepair/pull/170
+- Fix bug where selecting the document editing mode again deselects the mode by @devleejb in https://github.com/yorkie-team/codepair/pull/171
+- Add yorkie cluster to `docker-compose-full.yml` by @devleejb in https://github.com/yorkie-team/codepair/pull/176
+- Update 'Return to Workspace' Button Functionality and Visibility by @devleejb in https://github.com/yorkie-team/codepair/pull/190
+- Bump JamesIves/github-pages-deploy-action from 4.5.0 to 4.6.0 by @dependabot in https://github.com/yorkie-team/codepair/pull/189
+- Bump JamesIves/github-pages-deploy-action from 4.6.0 to 4.6.1 by @dependabot in https://github.com/yorkie-team/codepair/pull/199
+- Fix typo in `.env.example` in backend by @devleejb in https://github.com/yorkie-team/codepair/pull/204
+- Remove `.env` from git cache by @devleejb in https://github.com/yorkie-team/codepair/pull/206
+- Update yorkie-js-sdk to version 0.4.24 by @hackerwins in https://github.com/yorkie-team/codepair/pull/208
+- Update CodePair Workspace Page Layout with Recent Figma Design by @devleejb in https://github.com/yorkie-team/codepair/pull/207
+- Ensure Proper Cleanup of Yorkie Initialization Process by @chacha912 in https://github.com/yorkie-team/codepair/pull/210
+- Fix Document Count Display Issue and Loading Progress Bar Size in Pagination by @devleejb in https://github.com/yorkie-team/codepair/pull/212
+- Change `NODE_ENV` value to 'development' temporarily for enabling Devtools by @devleejb in https://github.com/yorkie-team/codepair/pull/214
+- Enable Devtools Flag for Debugging in Production Environment by @devleejb in https://github.com/yorkie-team/codepair/pull/215
+- Implement Sentry SourceMap Upload during Build Time for GitHub Page deployment by @devleejb in https://github.com/yorkie-team/codepair/pull/216
+- Change working directory of Sentry setup in `./frontend` by @devleejb in https://github.com/yorkie-team/codepair/pull/217
+- Modify GitHub Actions Triggering to Include Changes in Action Definition Files by @devleejb in https://github.com/yorkie-team/codepair/pull/218
+- Fix issue where SourceMaps were not uploaded even though Sentry keys were correctly registered by @devleejb in https://github.com/yorkie-team/codepair/pull/219
+- Add console.log for debugging document sync issue in CodePair by @devleejb in https://github.com/yorkie-team/codepair/pull/221
+- Wrap `doc.update` to ensure `doc.update` code is executed only once by @devleejb in https://github.com/yorkie-team/codepair/pull/222
+- Add log to snapshot handler by @devleejb in https://github.com/yorkie-team/codepair/pull/225
+- Change `GetDocument` API call to `GetDocuments` to prevent consecutive API calls by @devleejb in https://github.com/yorkie-team/codepair/pull/226
+- Update `yorkie-js-sdk` to `0.4.26` by @devleejb in https://github.com/yorkie-team/codepair/pull/227
+- Remove unused logs by @devleejb in https://github.com/yorkie-team/codepair/pull/229
+- Reduce initial project setup cost by introducing Feature Toggle functionality by @devleejb in https://github.com/yorkie-team/codepair/pull/230
+- Remove removed types import statement by @devleejb in https://github.com/yorkie-team/codepair/pull/231
+- Bump up Yorkie to v0.4.27 by @devleejb in https://github.com/yorkie-team/codepair/pull/232
+- update file paths in README.md by @minai621 in https://github.com/yorkie-team/codepair/pull/233
+- Fix loading issue of Document when viewing shared documents by moving `useSettingsQuery` Hook globally by @devleejb in https://github.com/yorkie-team/codepair/pull/235
+- Add Display additional users in a popover when there are more than 4 users by @KimKyuHoi in https://github.com/yorkie-team/codepair/pull/241
+- Update Code to Match GetDocuments API Request Specifications by @kokodak in https://github.com/yorkie-team/codepair/pull/242
+- Remove Global Scroll on Document Edit Page by @bishoe01 in https://github.com/yorkie-team/codepair/pull/243
+- Add Rename Nickname by @devysi0827 in https://github.com/yorkie-team/codepair/pull/237
+- Fix typo in README and Contributing Guide by @choidabom in https://github.com/yorkie-team/codepair/pull/245
+- Add Document Export Functionality by @minai621 in https://github.com/yorkie-team/codepair/pull/238
+- Disable Markdown Export feature due to inability to build backend in current Docker image by @devleejb in https://github.com/yorkie-team/codepair/pull/246
+- Fix build issues in CI by @minai621 in https://github.com/yorkie-team/codepair/pull/248
+- Disable Codes Related to Markdown Export by @devleejb in https://github.com/yorkie-team/codepair/pull/249
+- Update Dockerfile to Support Export Feature and Enable Export Feature by @krapie in https://github.com/yorkie-team/codepair/pull/251
+- Add Korean font to Docker image for language rendering in Markdown Export using Puppeteer by @devleejb in https://github.com/yorkie-team/codepair/pull/252
+- Fix document updateAt mapping by @blurfx in https://github.com/yorkie-team/codepair/pull/254
diff --git a/MAINTAINING.md b/MAINTAINING.md
new file mode 100644
index 00000000..99f64c30
--- /dev/null
+++ b/MAINTAINING.md
@@ -0,0 +1,38 @@
+# Maintaining CodePair
+
+## Releasing a New Version
+
+### 1. Update the version number.
+
+- Update `version` in [package.json in `frontend/`](https://github.com/yorkie-team/codepair/blob/1f10dff1d9c253f921ba136c812383fbb292078f/frontend/package.json#L5) and [package.json in `backend/`](https://github.com/yorkie-team/codepair/blob/1f10dff1d9c253f921ba136c812383fbb292078f/backend/package.json#L3).
+- Update `version` in `package-lock.json` in `frontend/` and `backend/`. It will be automatically updated when you run `npm install`.
+
+### 2. Write changelog of this version in [CHANGELOG.md](https://github.com/yorkie-team/codepair/blob/main/CHANGELOG.md).
+
+Copy the release notes automatically generated by GitHub and categorize them as `Added`/`Changed`/`Fixed`.
+
+1. Click on the `Releases` in GitHub.
+2. Click on the `Draft a new release` button.
+3. Create a new tag.
+4. Click on the `Generate release notes` button.
+5. Copy the content generated into the body and categorize each item.
+
+
+
+### 3. Create [Pull Request](https://github.com/yorkie-team/codepair/commits/main/CHANGELOG.md) for changelog and merge it into main.
+
+### 4. Publish [a new release](https://github.com/yorkie-team/codepair/releases/new).
+
+After creating the release in step 2, click on the `Publish release` button.
+
+
+
+### 5. Deploy
+
+#### 1) Docker
+
+When you publish the release in step 3, [GitHub Action](https://github.com/yorkie-team/codepair/blob/main/.github/workflows/docker-publish.yaml) will deploy Yorkie to [Docker Hub](https://hub.docker.com/r/yorkieteam/codepair/tags).
+
+#### 2) GitHub Pages
+
+When you publish the release in step 3, [GitHub Action](https://github.com/yorkie-team/codepair/blob/main/.github/workflows/gh_pages.yaml) will deploy the frontend to [GitHub Pages](https://codepair.yorkie.dev).