added step in workflow to automatic build psql-init image

.github/workflows/master_merge.yml

@@ -246,3 +246,49 @@ jobs:
             ghcr.io/keitaroinc/datapusher:${{ steps.datapusher.outputs.IMAGE_TAG }}
           cache-from: type=local,src=/tmp/.buildx-cache-datapusher
           cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-datapusher
+    
+  build-psql-init:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1 
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1 
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.CR_PAT }}
+
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache-psql-init
+          key: ${{ runner.os }}-buildx-psql-init-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-psql-init
+
+      - name: Get docker tag for psql-init image
+        id: psql-init
+        run: |
+          echo "::set-output name=IMAGE_TAG::$(awk -F '=' '/IMAGE_TAG/{print $2}' ./images/ckan/2.9/psql-init/Dockerfile)"
+
+      - name: Build and push psql-init
+        uses: docker/build-push-action@v2
+        with:
+          context: ./images/ckan/2.9/psql-init
+          file: ./images/ckan/2.9/psql-init/Dockerfile
+          push: true
+          tags: |
+            keitaro/psql-init:${{ steps.psql-init.outputs.IMAGE_TAG }}
+            ghcr.io/keitaroinc/datapusher:${{ steps.psql-init.outputs.IMAGE_TAG }}
+          cache-from: type=local,src=/tmp/.buildx-cache-psql-init
+          cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-psql-init

images/ckan/2.9/psql-init/Dockerfile

@@ -2,6 +2,9 @@
 # Start with a lightweight base image
 FROM python:3.9-alpine
 
+# Used by Github Actions to tag the image with
+ENV IMAGE_TAG=0.0.1
+
 # Set the working directory in the container
 WORKDIR /srv
 
@@ -14,4 +17,3 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Copy the rest of the application code to the container
 COPY psql-init/  .
 
-CMD ["sleep", "1000"]