ci(docker): smoke test the built image

After building the image, this adds a test that it actually runs and reports itself as healthy. This covers that the
HTTP server runs, not that the content inside (specifically the React application) is working.

Refs #390

.github/smoke-test.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -e
+
+function finish() {
+  echo "Stopping all containers"
+  docker-compose logs
+  docker-compose down
+}
+
+trap finish EXIT
+
+export IMAGE_TAG="${IMAGE_TAG:-local}"
+
+docker-compose up --detach
+container=prereview
+
+timeout --foreground 20 bash << EOT
+  while true; do
+    current=\$(docker inspect "${container}" | jq -r '.[0].State.Health.Status')
+    echo "${container} is in state: \${current}"
+    if [ "\$current" == "healthy" ]; then
+      break
+    fi
+    sleep 1
+  done
+EOT

.github/workflows/deploy_prereview-dev.yml

@@ -35,6 +35,9 @@ jobs:
     - name: 'Build image'
       run: docker-compose build prereview
 
+    - name: 'Smoke test'
+      run: .github/smoke-test.sh
+
     - name: 'Tag image'
       run: docker tag prereview.azurecr.io/prereview:${IMAGE_TAG} prereview.azurecr.io/prereview:develop
 

.github/workflows/deploy_prereview-staging.yml

@@ -35,6 +35,9 @@ jobs:
     - name: 'Build image'
       run: docker-compose build prereview
 
+    - name: 'Smoke test'
+      run: .github/smoke-test.sh
+
     - name: 'Tag image'
       run: docker tag prereview.azurecr.io/prereview:${IMAGE_TAG} prereview.azurecr.io/prereview:latest
 

docker-compose.yml

@@ -1,6 +1,7 @@
 version: "3"
 services:
   prereview:
+    container_name: prereview
     image: prereview.azurecr.io/prereview:${IMAGE_TAG:-local}
     build: .
     depends_on: