feat: yarn caching and publish to github

.github/workflows/build.yaml

@@ -1,7 +1,5 @@
 name: 'Build'
-
 on: push
-
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -13,20 +11,27 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node-version }}
-      - name: Cache Node.js modules
+
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
+
+      - name: Use yarn cache
         uses: actions/cache@v2
+        id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
         with:
-          # yarn cache files are stored in `~/.cache/yarn` on Linux/macOS
-          path: ~/.cache/yarn
-          key: ${{ runner.OS }}-node-${{ hashFiles('**/yarn.lock') }}
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
           restore-keys: |
-            ${{ runner.OS }}-node-
-            ${{ runner.OS }}-
+            ${{ runner.os }}-yarn-
+
       - name: Install dependencies
         run: yarn --frozen-lockfile
+
       - name: Run tests
         run: yarn test

.github/workflows/publish-docker.yaml

@@ -0,0 +1,19 @@
+name: Publish Docker image
+on:
+  release:
+    types: [published]
+jobs:
+  push_to_registry:
+    name: Push Docker image to GitHub Packages
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v2
+      - name: Push to GitHub Packages
+        uses: docker/build-push-action@v1
+        with:
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+          registry: docker.pkg.github.com
+          repository: my-org/my-repo/my-image
+          tag_with_ref: true