Copy asgi.py, ensure container runs as a CI check, (#179)

This PR ensures that we copy the new asgi.py file (introduced in #161) into the container, which fixes #178.

It also adds a step in the build / publish workflow to spin up the container and check that it starts successfully.

Author: grahamalama

.dockerignore

@@ -1,9 +1,10 @@
 # ignore everything
 *
 # use exceptions to create an "allow list"
-!/config
-!/src
+!/asgi.py
 !/bin
+!/config
 !/poetry.lock
 !/pyproject.toml
-!/version.json
+!/src
+!/version.json

.github/workflows/build-publish.yaml

@@ -13,6 +13,9 @@ on:
 jobs:
   build-and-publish:
     runs-on: ubuntu-latest
+    env:
+      TEST_TAG: ${{ github.repository }}:test
+      TEST_CONTAINER_NAME: jbi-healthcheck
     steps:
       - name: Check out the repo
         uses: actions/checkout@v3
@@ -43,6 +46,31 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
+      - name: Build and export to Docker
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          load: true
+          push: false
+          tags: ${{ env.TEST_TAG }}
+
+      - name: Spin up container
+        run: |
+          docker run \
+          --name ${{ env.TEST_CONTAINER_NAME }} \
+          --detach \
+          --env-file .env.example \
+          --publish 8000:8000 \
+          ${{ env.TEST_TAG }}
+
+      - name: Check that container is running
+        run: |
+          docker exec ${{ env.TEST_CONTAINER_NAME }} python bin/healthcheck.py
+
+      - name: Spin down container
+        run: |
+          docker rm -f ${{ env.TEST_CONTAINER_NAME }}
+
       - name: Build and push
         uses: docker/build-push-action@v3
         with:

bin/healthcheck.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python
+
+import os
+
+import requests
+from requests.adapters import HTTPAdapter, Retry
+
+PORT = os.environ["PORT"]
+
+session = requests.Session()
+
+retries = Retry(total=5, backoff_factor=0.1, status_forcelist=[500, 502, 503, 504])
+session.mount("http://", HTTPAdapter(max_retries=retries))
+if __name__ == "__main__":
+    response = session.get(f"http://0.0.0.0:{PORT}/")
+    response.raise_for_status()