Add app revision to service

- Display APP_REVISION in root route
- Add APP_REVISION as build arg in Dockerfile
- Pass git SHA as APP_REVISION in GitHub workflow

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: dtinth

.github/workflows/docker.yml

@@ -40,5 +40,7 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            APP_REVISION=${{ github.sha }}
           cache-from: type=gha
           cache-to: type=gha,mode=max

service/Dockerfile

@@ -4,5 +4,9 @@ COPY package.json pnpm-lock.yaml ./
 RUN corepack enable && pnpm install --frozen-lockfile
 COPY . .
 ENV NODE_ENV=production
+
+ARG APP_REVISION=unknown
+ENV APP_REVISION=${APP_REVISION}
+
 CMD ["pnpm", "start"]
 EXPOSE 29691

service/src/main.ts

@@ -38,7 +38,7 @@ const line = new Elysia()
 
 const app = new Elysia({ adapter: node() })
   .use(createLogger())
-  .get('/', () => 'i am automatron')
+  .get('/', () => `i am automatron (revision: ${process.env.APP_REVISION || 'unknown'})`)
   .get('/recipient', () => getRecipient())
   .get('/config', async () => {
     console.log(await config.get('test'))