ci: Add Docker test step

Author: eliandoran

.github/workflows/main-docker.yml

@@ -15,11 +15,51 @@ env:
     GHCR_REGISTRY: ghcr.io
     DOCKERHUB_REGISTRY: docker.io
     IMAGE_NAME: ${{ github.repository }}
+    TEST_TAG: triliumnext/notes:test
 
 jobs:
+    test_docker:
+        name: Check Docker build
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout the repository
+              uses: actions/checkout@v4
+
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
+
+            - name: Set up node & dependencies
+              uses: actions/setup-node@v4
+              with:
+                node-version: 20
+                cache: "npm"
+            
+            - run: npm ci
+            
+            - name: Run the TypeScript build
+              run: npx tsc
+            
+            - name: Create server-package.json
+              run: cat package.json | grep -v electron > server-package.json
+
+            - name: Build and export to Docker
+              uses: docker/build-push-action@v6
+              with:
+                context: .
+                load: true
+                tags: ${{ env.TEST_TAG }}
+                cache-from: type=gha
+                cache-to: type=gha,mode=max
+
+            - name: Run the container
+              run: |
+                docker run --rm ${{ env.TEST_TAG }}
+
     build_docker:
         name: Build Docker images
         runs-on: ubuntu-latest
+        needs:
+            - test_docker
         permissions:
           contents: read
           packages: write

.github/workflows/main.yml

@@ -8,6 +8,7 @@ on:
     paths-ignore:
       - "docs/**"
       - "bin/**"
+      - ".github/workflows/main-docker.yml"
     tags:
       - "v*"
   workflow_dispatch: