ci: start writing release job

.github/workflows/release.yml

@@ -0,0 +1,36 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - feat/semantic-release # TODO - change the branch
+
+jobs:
+  bundler:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Clone codesandbox-client
+        uses: actions/checkout@v2
+        with:
+          repository: codesandbox/codesandbox-client
+      - name: Yarn and build bundler
+        run: |
+          cd codesandbox-client
+          yarn && yarn build:deps && yarn && build:sandpack
+
+  publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Setup | Checkout
+        uses: actions/checkout@v2
+        with:
+          # pulls all commits (needed for lerna / semantic release to correctly version)
+          fetch-depth: "0"
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Build
+        run: yarn run build