feat: add health check

Dockerfile

@@ -24,7 +24,7 @@ FROM node:20-alpine
 # Delete default node user
 RUN deluser --remove-home node
 
-RUN apk add --no-cache caddy su-exec
+RUN apk add --no-cache caddy curl su-exec
 COPY ./reverse-proxy /etc/caddy/
 
 WORKDIR /app

docker-compose.yml

@@ -6,4 +6,11 @@ services:
     ports:
       - 3000:80
     volumes:
-      - "./data:/app/backend/data"
+      - "./data:/app/backend/data"
+    # Optional healthcheck  
+    healthcheck:
+      test: "curl -f http://localhost/health"
+      interval: 1m30s
+      timeout: 5s
+      retries: 2
+      start_period: 10s

frontend/src/routes/health/+server.ts

@@ -0,0 +1,20 @@
+import AppConfigService from '$lib/services/app-config-service';
+import type { RequestHandler } from '@sveltejs/kit';
+
+export const GET: RequestHandler = async () => {
+	const appConfigService = new AppConfigService();
+	let backendOk = true;
+	await appConfigService.list().catch(() => (backendOk = false));
+
+	return new Response(
+		JSON.stringify({
+			status: backendOk ? 'HEALTHY' : 'UNHEALTHY'
+		}),
+		{
+			status: backendOk ? 200 : 500,
+			headers: {
+				'content-type': 'application/json'
+			}
+		}
+	);
+};