actions: Added dockerimage workflow

to push image to ghcr.io and DockerHub.

Author: vasilev

.github/workflows/dockerimage.yml

@@ -0,0 +1,46 @@
+name: Build Docker Image
+
+on:
+  push:
+    tags:
+      - v*
+
+jobs:
+  # Push image to Package Registries (ghcr.io and DockerHub).
+  build-and-push:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Log into registry (DockerHub)
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+          
+      - name: Log into registry (ghcr.io)
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GHCR_PASSWORD }}
+          
+      - name: Extract metadata
+        id: metadata
+        uses: docker/metadata-action@v3
+        with:
+          images: |
+            vasilev/clojurescript
+            ghcr.io/vasilev/clojurescript
+            
+      - name: Debug Print metadata
+        run: echo "${{ steps.metadata.outputs }}"
+
+      - name: Build and push the image
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.metadata.outputs.tags }}