Update ci.yml to perform a multi-variant build

.github/workflows/ci.yml

@@ -24,6 +24,13 @@ jobs:
   docker:
     runs-on: ubuntu-latest
     needs: pytest
+    strategy:
+      matrix:
+        include:
+          - dockerfile: Dockerfile
+            variant: alpine
+          - dockerfile: Dockerfile.slim
+            variant: slim
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -37,12 +44,12 @@ jobs:
         with:
           images: ${{ secrets.DOCKER_USERNAME }}/jellyplex-watched # list of Docker images to use as base name for tags
           tags: |
-            type=raw,value=latest,enable={{is_default_branch}}
-            type=ref,event=branch
-            type=ref,event=pr
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=sha
+            type=raw,value=${{ matrix.variant }},enable={{is_default_branch}}
+            type=ref,event=branch,suffix=${{ matrix.variant }}
+            type=ref,event=pr,suffix=${{ matrix.variant }}
+            type=semver,pattern={{version}},suffix=${{ matrix.variant }}
+            type=semver,pattern={{major}}.{{minor}},suffix=${{ matrix.variant }}
+            type=sha,suffix=${{ matrix.variant }}
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
@@ -63,7 +70,7 @@ jobs:
         uses: docker/build-push-action@v3
         with:
           context: .
-          file: ./Dockerfile
+          file: ${{ matrix.dockerfile }}
           platforms: linux/amd64,linux/arm64
           push: false
           tags: jellyplex-watched:action
@@ -74,7 +81,7 @@ jobs:
         uses: docker/build-push-action@v3
         with:
           context: .
-          file: ./Dockerfile
+          file: ${{ matrix.dockerfile }}
           platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.docker_meta.outputs.tags }}