feat: simultaneously build p2w-relay/attest.

also use meta to tag the image.

.github/workflows/docker-image-p2w-attest.yml

@@ -1,10 +1,14 @@
-name: build docker image
+name: build attest docker image
 
 on:
   push:
+    branches:
+      - "master"
     tags:
       - "v*"
   pull_request:
+    branches:
+      - "master"
 
 jobs:
   docker:
@@ -13,14 +17,17 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
-      - name: Set outputs
-        id: vars
-        run: echo "::set-output name=sha_short::$(git rev-parse --short HEAD)"
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ secrets.DOCKERHUB_USERNAME }}/p2w-attest
 
       - name: Set up Docker 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 }}
@@ -30,18 +37,9 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           platforms: linux/amd64
-          push: true
-          tags: ${{ secrets.DOCKERHUB_USERNAME }}/p2w-attest:${{ steps.vars.outputs.sha_short }}
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
           target: p2w-attest
           cache-from: type=gha
           cache-to: type=gha,mode=max
-
-      - name: Build and push p2w-relay
-        uses: docker/build-push-action@v2
-        with:
-          platforms: linux/amd64
-          push: true
-          tags: ${{ secrets.DOCKERHUB_USERNAME }}/p2w-relay:${{ steps.vars.outputs.sha_short }}
-          target: p2w-relay
-          cache-from: type=gha
-          cache-to: type=gha,mode=max

.github/workflows/docker-image-p2w-relay.yml

@@ -0,0 +1,45 @@
+name: build relay docker image
+
+on:
+  push:
+    branches:
+      - "master"
+    tags:
+      - "v*"
+  pull_request:
+    branches:
+      - "master"
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ secrets.DOCKERHUB_USERNAME }}/p2w-relay
+
+      - name: Set up Docker 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: Build and push p2w-relay
+        uses: docker/build-push-action@v2
+        with:
+          platforms: linux/amd64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          target: p2w-relay
+          cache-from: type=gha
+          cache-to: type=gha,mode=max