fixes container workflow to use buildx for multi-platform support

Author: lmcdonough

.github/workflows/build_and_deploy_containers.yml

@@ -26,41 +26,23 @@ jobs:
       - name: Set up Rust + QEMU
         uses: docker/setup-qemu-action@v2
         with:
-          platforms: linux/amd64,linux/arm64  # ✅ Only needed once per buildx host
+          platforms: linux/amd64,linux/arm64
 
-      # Install ARM cross-compiler
-      - name: Install cross-compilation toolchain
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y gcc-aarch64-linux-gnu
-
-      # Install Rust toolchain with both x86_64 and arm64 targets
-      - name: Set up Rust targets
+      # Install Rust and cache artifacts
+      - name: Set up Rust
         uses: dtolnay/rust-toolchain@stable
         with:
-          targets: x86_64-unknown-linux-gnu,aarch64-unknown-linux-gnu  # ✅ Targets declared here
+          toolchain: stable
 
-      # Cache Rust build artifacts (unique key avoids 409 Conflict errors)
       - uses: Swatinem/rust-cache@v2
         with:
           shared-key: ${{ runner.os }}-cargo-${{ github.sha }}
 
-      # Install sea-orm-cli globally
+      # Install sea-orm-cli globally (if needed for migration or seed)
       - name: Install sea-orm-cli
         run: cargo install sea-orm-cli
 
-      # Configure the Rust linker for arm64 builds
-      - name: Set linker for cross-compilation
-        run: |
-          mkdir -p ~/.cargo
-          echo '[target.aarch64-unknown-linux-gnu]' >> ~/.cargo/config.toml
-          echo 'linker = "aarch64-linux-gnu-gcc"' >> ~/.cargo/config.toml
-
-      # Build release binaries for ARM64
-      - name: Build release binaries
-        run: cargo build --release --workspace --target aarch64-unknown-linux-gnu
-
-      # Run tests for x86_64 (native)
+      # Run tests for x86_64 only (CI feedback)
       - name: Run tests
         run: cargo test --release
 
@@ -77,7 +59,7 @@ jobs:
       # Checkout source code
       - uses: actions/checkout@v4
 
-      # Authenticate to GitHub Container Registry
+      # Docker login to GHCR
       - name: Docker login
         uses: docker/login-action@v2
         with:
@@ -96,7 +78,7 @@ jobs:
           echo -e "\033[1;34m🔍 Checking buildx cache BEFORE build...\033[0m"
           docker buildx du || echo -e "\033[1;33m⚠️ No cache found yet.\033[0m"
 
-      # Compute image name based on branch name and tag as `latest`
+      # Compute image tag
       - name: Determine Image Tags
         id: tags
         run: |
@@ -105,27 +87,27 @@ jobs:
           echo "backend_tags=$IMAGE_NAME:latest" >> $GITHUB_OUTPUT
           echo "backend_image_name=$IMAGE_NAME" >> $GITHUB_OUTPUT
 
-      # Build and push multi-arch Docker image with GHA cache
+      # Build and push multi-arch Docker image with cache
       - name: Build + Push Backend
         id: push_backend
         uses: docker/build-push-action@v5
         with:
           context: .
           file: ./Dockerfile
-          platforms: linux/amd64,linux/arm64  # ✅ Declared again for buildx
+          platforms: linux/amd64,linux/arm64  # ✅ Key multi-arch setting
           push: true
           provenance: true
           tags: ${{ steps.tags.outputs.backend_tags }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
 
-      # Show updated Docker cache state
+      # Show updated cache usage
       - name: Show Docker Build Cache (After)
         run: |
           echo -e "\033[1;34m📦 Checking buildx cache AFTER build...\033[0m"
           docker buildx du || echo -e "\033[1;31m❌ Failed to get updated cache info\033[0m"
 
-      # Generate SBOM + attestation only on main branch
+      # Attest build provenance if on main branch
       - name: Attest Backend
         if: github.ref == 'refs/heads/main' && github.event_name == 'push'
         uses: actions/attest-build-provenance@v2
@@ -141,4 +123,4 @@ jobs:
           echo "  docker pull ${{ steps.tags.outputs.backend_image_name }}:latest"
           echo ""
           echo -e "\033[1;36m▶️ Run Backend:\033[0m"
-          echo "  docker run --rm -p 8000:8000 ${{ steps.tags.outputs.backend_image_name }}:latest"
+          echo "  docker run --rm --env-file .env -p 8000:8000 ${{ steps.tags.outputs.backend_image_name }}:latest"