Build, deploy and then use prebuilt docker image

.github/workflows/container-build.yml

@@ -0,0 +1,50 @@
+name: Build & Deploy Container 
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - 'v*'
+  workflow_dispatch: {}
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+
+      - name: Log in to Github Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.CR_PAT }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

action.yml

@@ -26,7 +26,7 @@ inputs:
     default: ${{ github.event_name }}
 runs:
   using: docker
-  image: Dockerfile
+  image: 'docker://ghcr.io/stoplightio/spectral-action:0.8.3'
 branding:
   icon: code
   color: yellow