Create docker-ghcr.yml

.github/workflows/docker-ghcr.yml

@@ -0,0 +1,25 @@
+name: Publish a Docker image to ghcr.io
+on:
+  pull_request:
+    branches:
+      - main
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: echo "REPO=${GITHUB_REPOSITORY,,}" >> $GITHUB_ENV
+      - name: Enable buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Login
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Docker build/push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: true
+          tags: ghcr.io/${{ env.REPO }}:latest