Publish image to GitHub's registry

.github/workflows/publish.yml

@@ -1,29 +1,58 @@
 name: Publish
+
 on:
   push:
     tags:
       - 'v[0-9]+.[0-9]+.[0-9]+'
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
 jobs:
   test_build_publish:
     name: Test, build, and publish
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
+
       - name: Export GOBIN
         uses: actions/setup-go@v2
         with:
           go-version: 1.16
+
       - name: Install dependencies
         run: make setup
+
       - name: Run tests
         run: make test
+
       - name: Build image
         run: make build_image
-      - name: Login to Docker Hub
+
+      - name: Log in to the Container registry
         uses: docker/login-action@v1
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-      - name: Publish image
-        run: make push_image
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest
+
+      - 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 }}

Makefile

@@ -20,11 +20,3 @@ test:
 setup:
 	go install github.com/fzipp/gocyclo/cmd/gocyclo@latest
 	go install honnef.co/go/tools/cmd/staticcheck@latest
-
-.PHONY: build_image
-build_image:
-	docker build -t ${IMAGE}:latest .
-
-.PHONY: push_image
-push_image:
-	docker push ${IMAGE}:latest

README.md

@@ -75,7 +75,7 @@ version: '2'
 
 services:
     server:
-        image: eikendev/pushbits:latest
+        image: ghcr.io/pushbits/server:latest
         ports:
             - 8080:8080
         environment: