Add devcontainer for ACA-Py

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/python
+{
+    "name": "aries_cloudagent",
+    // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+    "image": "mcr.microsoft.com/devcontainers/python:0-3.9-buster",
+    // Features to add to the dev container. More info: https://containers.dev/features.
+    // "features": {},
+    // Use 'forwardPorts' to make a list of ports inside the container available locally.
+    "forwardPorts": [
+        9060,
+        9061
+    ],
+    // Use 'postCreateCommand' to run commands after the container is created.
+    "postCreateCommand": "python -m pip install --upgrade pip && pip3 install -r requirements.txt -r requirements.askar.txt -r requirements.bbs.txt -r requirements.dev.txt -r requirements.indy.txt &&  pip3 install black",
+    // Configure tool-specific properties.
+    "customizations": {
+        "vscode": {
+            "extensions": [
+				"ms-python.python",
+				"ms-python.vscode-pylance"
+			],
+            "settings": {
+                "python.testing.pytestArgs": [
+                    ".",
+                    "--no-cov"
+                ],
+                "python.testing.unittestEnabled": false,
+                "python.testing.pytestEnabled": true,
+                "python.testing.pytestPath": "pytest",
+                "editor.defaultFormatter": null,
+                "editor.formatOnSave": false, // enable per language
+                "[python]": {
+                    "editor.formatOnSave": true
+                },
+                "python.formatting.provider": "black",
+                "python.formatting.blackPath": "/usr/local/py-utils/bin/black",
+                "python.formatting.blackArgs": []
+            }
+        }
+    }
+    // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+    // "remoteUser": "root"
+}

.vscode-sample/launch.json

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+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Run/Debug ACA-Py",
+            "type": "python",
+            "request": "launch",
+            "module": "aries_cloudagent",
+            "justMyCode": true,
+            "args": [
+                "start",
+                "--arg-file=${workspaceRoot}/.vscode/multitenant.yml"
+            ]
+        },
+        {
+            "name": "flake8 - aries_cloudagent",
+            "type": "python",
+            "request": "launch",
+            "module": "flake8",
+            "console": "integratedTerminal",
+            "justMyCode": true,
+            "cwd": "${workspaceFolder}/aries_cloudagent",
+            "args": [
+                "--max-line-length=90",
+                "--exclude=*/tests/**",
+                "--extend-ignore=D202,W503",
+                "--per-file-ignores=*/__init__.py:D104"
+            ],
+        },
+        {
+            "name": "flake8 - current file",
+            "type": "python",
+            "request": "launch",
+            "module": "flake8",
+            "console": "integratedTerminal",
+            "justMyCode": true,
+            "args": [
+                "--max-line-length=90",
+                "--exclude=*/tests/**",
+                "--extend-ignore=D202,W503",
+                "--per-file-ignores=*/__init__.py:D104",
+                "${file}"
+            ],
+        },
+        {
+            "name": "black (check) - aries_cloudagent",
+            "type": "python",
+            "request": "launch",
+            "module": "black",
+            "console": "integratedTerminal",
+            "justMyCode": true,
+            "cwd": "${workspaceFolder}/aries_cloudagent",
+            "args": [
+                ".",
+                "--check"
+            ],
+        },
+        {
+            "name": "black (check) - current file",
+            "type": "python",
+            "request": "launch",
+            "module": "black",
+            "console": "integratedTerminal",
+            "justMyCode": true,
+            "args": [
+                "${file}",
+                "--check"
+            ],
+        },
+        {
+            "name": "black (format) - aries_cloudagent",
+            "type": "python",
+            "request": "launch",
+            "module": "black",
+            "console": "integratedTerminal",
+            "justMyCode": true,
+            "cwd": "${workspaceFolder}/aries_cloudagent",
+            "args": [
+                "."
+            ],
+        },
+        {
+            "name": "black (format) - current file",
+            "type": "python",
+            "request": "launch",
+            "module": "black",
+            "console": "integratedTerminal",
+            "justMyCode": true,
+            "args": [
+                "${file}",
+            ],
+        },
+    ]
+}

.vscode-sample/multitenant.yml

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+auto-provision: true
+label: vscode
+
+inbound-transport:
+   - [http, 0.0.0.0, 9060]
+
+outbound-transport: http
+
+emit-new-didcomm-prefix: true
+wallet-type: askar
+wallet-storage-type: default
+
+admin-insecure-mode: true
+
+admin: [0.0.0.0, 9061]
+
+endpoint: http://host.docker.internal:9060
+
+genesis-url: http://test.bcovrin.vonx.io/genesis
+
+# Connections
+debug-connections: true
+auto-accept-invites: true
+auto-accept-requests: true
+auto-ping-connection: true
+
+# multitenant
+multitenant: true
+multitenant-admin: true
+jwt-secret: changeme
+
+log-level: info

.vscode-sample/settings.json

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+{
+    "python.testing.pytestArgs": ["--no-cov"],
+}

devcontainer.md

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+For information on running demos and tests using provided shell scripts, see [DevReadMe](/DevReadMe.md) readme.
+
+# ACA-Py Development with Dev Container
+The following guide will get you up and running and developing/debugging ACA-Py as quickly as possible. 
+We provide a [`devcontainer`](https://containers.dev) and will use [`VS Code`](https://code.visualstudio.com) to illustrate.
+
+By no means is ACA-Py limited to these tools; they are merely examples.  
+
+## Caveats
+
+The primary use case for this `devcontainer` is for developing, debugging and unit testing (pytest) the [aries_cloudagent](./aries_cloudagent) source code.
+
+There are limitations running this devcontainer, such as not being able to select the docker network. Also, we are not expecting developers to run the [demos](./demo) or other docker based scripts within this container.
+
+
+## Further Reading and Links
+
+* Development Containers (devcontainers): [https://containers.dev](https://containers.dev)
+* Visual Studio Code: [https://code.visualstudio.com](https://code.visualstudio.com)
+* Dev Containers Extension: [marketplace.visualstudio.com](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers)
+* Docker: [https://www.docker.com](https://www.docker.com)
+* Docker Compose: [https://docs.docker.com/compose/](https://docs.docker.com/compose/)
+
+
+## Devcontainer
+
+> What are Development Containers?
+> 
+> A Development Container (or Dev Container for short) allows you to use a container as a full-featured development environment. It can be used to run an application, to separate tools, libraries, or runtimes needed for working with a codebase, and to aid in continuous integration and testing. Dev containers can be run locally or remotely, in a private or public cloud.
+
+see [https://containers.dev](https://containers.dev).
+
+In this guide, we will use [Docker](https://www.docker.com) and [Visual Studio Code](https://code.visualstudio.com) with the [Dev Containers Extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers) installed, please set your machine up with those. As of writing, we used the following: 
+
+- Docker Version: 20.10.24
+- VS Code Version: 1.79.0
+- Dev Container Extension Version: v0.295.0
+
+### Open ACA-Py in the devcontainer
+
+To open ACA-Py in a devcontainer, we open the *root* of this repository. We can open in 2 ways:
+
+1. Open Visual Studio Code, and use the Command Palette and use `Dev Containers: Open Folder in Container...`
+2. Open Visual Studio Code and `File|Open Folder...`, you should be prompted to `Reopen in Container`.
+
+*NOTE* follow any prompts to install `Python Extension` or reload window for `Pylance` when first building the container.
+
+#### devcontainer.json
+
+When the [.devcontainer/devcontainer.json](.devcontainer/devcontainer.json) is opened, you will see it building... it is building a Python 3.9 image (bash shell) and loading it with all the ACA-Py requirements (and black). Since this is a Docker container, we will also open ports `9060` and `9061`, allowing you to run/debug ACA-Py with those ports available to your `localhost` (more on those later). We also load a few Visual Studio settings (for running Pytests and formatting with Flake and Black).
+
+In VS Code, open a Terminal, you should be able to run the following commands:
+
+```
+python -m aries_cloudagent -v
+cd aries_cloudagent
+flake8 --max-line-length=90 --exclude=*/tests/** --extend-ignore=D202,W503 --per-file-ignores=*/__init__.py:D104
+black . --check
+```
+
+The first command should show you that `aries_cloudagent` module is loaded (ACA-Py). The others are examples of code quality checks that ACA-Py does on commits (if you have [`precommit`](https://pre-commit.com) installed) and Pull Requests.
+
+## Debugging
+
+To better illustrate debugging pytests and ACA-Py runtime code, let's add some run/debug configurations to VS Code. If you have your own `launch.json` and `settings.json`, please cut and paste what you want/need.
+
+```
+cp -R .vscode-sample .vscode
+```
+
+This will add a `launch.json`, `settings.json` and an ACA-Py configuration file: `multitenant.yml`. 
+
+### Pytest
+
+Pytest is installed and almost ready; however, we must build the test list. In the Command Palette, `Test: Refresh Tests` will scan and find the tests.
+
+See [Python Testing](https://code.visualstudio.com/docs/python/testing) for more details, and [Test Commands](https://code.visualstudio.com/docs/python/testing#_test-commands) for usage.
+
+*IMPORTANT*: our pytests include coverage, which will prevent the [debugger from working](https://code.visualstudio.com/docs/python/testing#_debug-tests). One way around this would be to have a `.vscode/settings.json` that says not to use coverage (see above). This will allow you to set breakpoints in the pytest and code under test and use commands such as `Test: Debug Tests in Current File` to start debugging.
+
+
+### ACA-Py
+
+Above, we added some run/debug configurations, one of which is to run our ACA-Py source code so we can debug it.
+
+In `launch.json` you will see:
+
+```
+        {
+            "name": "Run/Debug ACA-Py",
+            "type": "python",
+            "request": "launch",
+            "module": "aries_cloudagent",
+            "justMyCode": true,
+            "args": [
+                "start",
+                "--arg-file=${workspaceRoot}/.vscode/multitenant.yml"
+            ]
+        },
+```
+
+To run your ACA-Py code in debug mode, go to the `Run and Debug` view, select "Run/Debug ACA-Py" and click `Start Debugging (F5)`.
+
+This will start your source code as a running ACA-Py instance, all configuration is in the `multitenant.yml` file. This is just a sample of a configuration, and we chose multi-tenancy so we can easily create multiple wallets/agents and have them interact.  Note that we are not using a database and are joining the ` http://test.bcovrin.vonx.io` ledger. Feel free to change to a local VON Network (by default, it would be `http://host.docker.internal:9000`) or another ledger. This is purposefully a very simple configuration.
+
+Remember those ports we exposed in `devcontainer`? You can open a browser to `http://localhost:9061/api/doc` and see your Admin Console Swagger. Set some breakpoints and hit some endpoints, and start debugging your source code.
+
+For example, open `aries_cloudagent/admin/server.py` and set a breakpoint in `async def status_handler(self, request: web.BaseRequest):`, then call [`GET /status`](http://localhost:9061/api/doc#/server/get_status) in the Admin Console and hit your breakpoint.
+
+## Next Steps
+
+At this point, you now have a development environment where you can add pytests, add ACA-Py code and run and debug it all. Be aware there are limitations with `devcontainer` and other docker networks. You may need to adjust other docker-compose files not to start their own networks, and you may need to reference containers using `host.docker.internal`. This isn't a panacea but should get you going in the right direction and provide you with some development tools.