ci: publish docker images to github

Author: zimbatm

.github/workflows/docker.yml

@@ -0,0 +1,40 @@
+name: Publish Docker image
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  release:
+    types: [published]
+
+jobs:
+  push_to_registries:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v2
+      
+      - name: Log in to the Container registry
+        uses: docker/login-action@v1.10.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v3.5.0
+        with:
+          images: ghcr.io/${{ github.repository }}
+      
+      - name: Build and push Docker images
+        uses: docker/build-push-action@v2.7.0
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.github/workflows/go.yml

@@ -23,11 +23,3 @@ jobs:
 
     - name: Test
       run: go test -v ./...
-
-  docker:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2
-
-    - name: Build
-      run: docker build .