Optimize GitHub Actions CI/CD pipeline (#252)

- Switch Docker layer cache from local filesystem to GHA native cache
  (type=gha), eliminating the cache-size workaround hack
- Consolidate cancel-previous-runs into a single dedicated job to
  prevent race conditions from concurrent API calls
- Remove DATABASE_URL build-arg that was never consumed by the Dockerfile
- Add post-deploy health check that fails the job and prints logs if any
  container exits unexpectedly
- Add .nvmrc and use node-version-file instead of hardcoded node-version: 20

Fixes #249

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/deploy.yml

@@ -10,8 +10,15 @@ permissions:
     contents: read
 
 jobs:
+    cancel:
+        name: 🛑 Cancel Previous Runs
+        runs-on: ubuntu-latest
+        steps:
+            - uses: styfle/cancel-workflow-action@0.12.1
+
     test:
         name: 🧪 Test
+        needs: [cancel]
         runs-on: ubuntu-latest
 
         services:
@@ -30,16 +37,13 @@ jobs:
                     - 5432:5432
 
         steps:
-            - name: 🛑 Cancel Previous Runs
-              uses: styfle/cancel-workflow-action@0.12.1
-
             - name: ⬇️ Checkout repo
               uses: actions/checkout@v4
 
             - name: ⎔ Setup node
               uses: actions/setup-node@v4
               with:
-                  node-version: 20
+                  node-version-file: '.nvmrc'
                   cache: 'npm'
 
             - name: 📥 Install dependencies
@@ -53,18 +57,16 @@ jobs:
 
     typecheck:
         name: ʦ TypeScript
+        needs: [cancel]
         runs-on: ubuntu-latest
         steps:
-            - name: 🛑 Cancel Previous Runs
-              uses: styfle/cancel-workflow-action@0.12.1
-
             - name: ⬇️ Checkout repo
               uses: actions/checkout@v4
 
             - name: ⎔ Setup node
               uses: actions/setup-node@v4
               with:
-                  node-version: 20
+                  node-version-file: '.nvmrc'
                   cache: 'npm'
 
             - name: 📥 Install dependencies
@@ -75,18 +77,16 @@ jobs:
 
     lint:
         name: 🔍 Lint
+        needs: [cancel]
         runs-on: ubuntu-latest
         steps:
-            - name: 🛑 Cancel Previous Runs
-              uses: styfle/cancel-workflow-action@0.12.1
-
             - name: ⬇️ Checkout repo
               uses: actions/checkout@v4
 
             - name: ⎔ Setup node
               uses: actions/setup-node@v4
               with:
-                  node-version: 20
+                  node-version-file: '.nvmrc'
                   cache: 'npm'
 
             - name: 📥 Install dependencies
@@ -102,24 +102,12 @@ jobs:
         if: ${{ github.ref == 'refs/heads/main' && github.event_name == 'push' }}
         runs-on: ubuntu-latest
         steps:
-            - name: 🛑 Cancel Previous Runs
-              uses: styfle/cancel-workflow-action@0.12.1
-
             - name: ⬇️ Checkout repo
               uses: actions/checkout@v4
 
             - name: 🐳 Set up Docker Buildx
               uses: docker/setup-buildx-action@v3
 
-            # Setup cache
-            - name: ⚡️ Cache Docker layers
-              uses: actions/cache@v4
-              with:
-                  path: /tmp/.buildx-cache
-                  key: ${{ runner.os }}-buildx-${{ github.sha }}
-                  restore-keys: |
-                      ${{ runner.os }}-buildx-
-
             - name: 🔓 Login to Container Registry
               uses: docker/login-action@v3
               with:
@@ -133,26 +121,14 @@ jobs:
                   context: .
                   push: true
                   tags: ${{ vars.CONTAINER_REGISTRY }}/brackt:latest
-                  cache-from: type=local,src=/tmp/.buildx-cache
-                  cache-to: type=local,dest=/tmp/.buildx-cache-new,mode=max
-                  build-args: |
-                      DATABASE_URL=${{ secrets.PROD_DATABASE_URL }}
-
-            # This ugly bit is necessary if you don't want your cache to grow forever
-            # till it hits GitHub's limit of 10GB.
-            # Temp fix
-            # https://github.com/docker/build-push-action/issues/252
-            # https://github.com/moby/buildkit/issues/1896
-            - name: 🚚 Move cache
-              run: |
-                  rm -rf /tmp/.buildx-cache
-                  mv /tmp/.buildx-cache-new /tmp/.buildx-cache
+                  cache-from: type=gha
+                  cache-to: type=gha,mode=max
 
     deploy:
         name: 🚀 Deploy
         runs-on: ubuntu-latest
         needs: [build]
-        # only deploy main/dev branch on pushes
+        # only deploy main branch on pushes
         if: ${{ github.ref == 'refs/heads/main' && github.event_name == 'push' }}
 
         steps:
@@ -173,3 +149,9 @@ jobs:
                       cd brackt
                       docker compose pull
                       docker compose up -d
+                      sleep 10
+                      if docker compose ps | grep -qE "Exit|exited"; then
+                        echo "One or more containers failed to start:"
+                        docker compose logs --tail=50
+                        exit 1
+                      fi

.nvmrc

@@ -0,0 +1 @@
+20