Feature: docker image build workflow

.github/workflows/build.yml

@@ -0,0 +1,38 @@
+name: Build docker image
+on:
+  push:
+    branches: ["master"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: docker/setup-buildx-action@v2
+
+      - uses: docker/login-action@v2
+        with:
+          registry: "ghcr.io"
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: docker/metadata-action@v4
+        id: meta
+        with:
+          images: "ghcr.io/vimeda/helm"
+          tags: |
+            ${{ github.sha }}
+            latest
+
+      - uses: actions/checkout@v3
+
+      - uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

action.yml

@@ -66,4 +66,4 @@ inputs:
     required: false
 runs:
   using: docker
-  image: Dockerfile
+  image: docker://ghcr.io/vimeda/helm