add health check endpoint and update webserver routes

docker-compose.yml

@@ -9,4 +9,9 @@ services:
       - .:/app
     ports:
       - "$PORT:$PORT"
-    command: sh -c "npm i -g pnpm && pnpm install && pnpm dev"
+    command: sh -c "npm i -g pnpm && pnpm install && pnpm dev"
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:$PORT/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 1

src/web/health.ts

@@ -0,0 +1,7 @@
+import { Express } from 'express';
+
+export default function healthRoute(app: Express) {
+    app.get('/health', (req, res) => {
+        res.status(200).send('ok');
+    });
+}

src/webserver.ts

@@ -26,7 +26,7 @@ export default async function webserver() {
     });
 
     const IgnoredPaths = ['/favicon.ico', '/robots.txt', "/", "/hello"];
-    const KnownPaths = ["/git-commit", "/"];
+    const KnownPaths = ["/git-commit", "/", "/health"];
 
     // log all incoming requests
     app.use((req, res, next) => {