Create public docker images

.github/workflows/run-tests.yaml

@@ -98,11 +98,20 @@ jobs:
     name: Build docker images
     runs-on: ubuntu-latest
     steps:
+      - name: 'Login to GitHub container registry'
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{github.actor}}
+          password: ${{secrets.GITHUB_TOKEN}}
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0
       - name: Build the API docker image
         run: 'docker build --file packages/api/Dockerfile .'
+        run: |
+              docker build . --file packages/api/Dockerfile --tag ghcr.io/omnivore-app/backend:latest
+              docker push ghcr.io/omnivore-app/backend:latest
       - name: Build the content-fetch docker image
         run: 'docker build --file packages/content-fetch/Dockerfile .'
       - name: Build the inbound-email-handler docker image