added tags

.github/workflows/docker.yml

@@ -21,18 +21,37 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
 
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            buddyspencer/gickup
+            ghcr.io/buddyspencer/gickup
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=sha
       # setup Docker buld action
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v1
 
       - name: Login to DockerHub
+        if: github.event_name != 'pull_request'
         uses: docker/login-action@v1
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Login to Github Packages
+        if: github.event_name != 'pull_request'
         uses: docker/login-action@v1
         with:
           registry: ghcr.io
@@ -44,12 +63,10 @@ jobs:
         with:
           # relative path to the place where source code with Dockerfile is located
           context: .
-          # Note: tags has to be all lower-case
-          tags: |
-            buddyspencer/gickup:latest 
-            ghcr.io/buddyspencer/gickup:latest
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
           # build on feature branches, push only on main branch
-          push: ${{ github.ref == 'refs/heads/main' }}
+          push: ${{ github.event_name != 'pull_request' }}
           platforms: linux/amd64, linux/arm64, linux/arm/v7, linux/arm/v6
 
       - name: Image digest