Publish container to ghcr.io (#101)

.github/workflows/docker.yml

@@ -1,27 +1,50 @@
-name: Publish Docker image
-on:
-  push:
-    tags:
-      - v*
+name: Publish Container
+on: [push]
+
 jobs:
   push_to_registry:
-    name: Push Docker image to Docker Hub
+    name: Push to container registry
     runs-on: ubuntu-latest
     steps:
-      - name: Check out the repo
-        uses: actions/checkout@v2
-      - name: Publish version to Registry
-        uses: elgohr/Publish-Docker-Github-Action@master
-        with:
-          name: davegallant/rfd-notify
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-          tag_semver: true
-      - name: Publish latest to Registry
-        uses: elgohr/Publish-Docker-Github-Action@master
-        with:
-          name: davegallant/rfd-notify
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-          tags: "latest"
+      - uses: actions/checkout@v2
+
+      - name: Prepare
+        id: prep
+        run: |
+          IMAGE_NAME=ghcr.io/${{ github.repository_owner }}/rfd-notify
+          VERSION=${GITHUB_REF##*/}
+
+          if [[ $GITHUB_REF == refs/heads/main ]]; then
+            VERSION=latest
+          fi
+
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF#refs/tags/v}
+          fi
+
+          TAGS="${IMAGE_NAME}:${VERSION}"
+
+          if [[ $VERSION =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
+            TAGS="$TAGS,${IMAGE_NAME}:latest"
+          fi
+
+          echo ::set-output name=tags::${TAGS}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to GitHub Packages Docker Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push to Packages
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ steps.prep.outputs.tags }}