ci: Add build SHA to health check for deployment verification

Author: trillium

.github/workflows/aws-backend-deploy.yml

@@ -70,6 +70,7 @@ jobs:
             --cache-from type=gha \
             --cache-to type=gha,mode=max \
             --push \
+            --build-arg BUILD_SHA=$IMAGE_TAG \
             -f ${{ env.DOCKERFILE }} \
             -t $ECR_REGISTRY/$ECR_REPOSITORY:latest \
             -t $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG \

backend/Dockerfile.prod

@@ -12,4 +12,5 @@ USER node
 WORKDIR /srv/backend
 COPY --from=api-builder /srv/backend/node_modules ./node_modules
 COPY . .
+ENV BUILD_SHA=${BUILD_SHA}
 CMD ["npm", "run", "start"]

backend/controllers/healthCheck.controller.js

@@ -1,7 +1,9 @@
 const HealthCheckController = {};
 
 HealthCheckController.isAlive = (_, res) => {
-  res.status(200).send("I'm Alive!");
-}
+  res
+    .status(200)
+    .send(`I'm Alive! Build: ${process.env.BUILD_SHA || 'unknown'} - ${new Date().toISOString()}`);
+};
 
 module.exports = HealthCheckController;