feat(docker): add production Dockerfile, docker-compose setup and healthcheck API

src/pages/api/health.ts

@@ -0,0 +1,37 @@
+import type { APIRoute } from 'astro';
+import fs from 'node:fs/promises';
+import path from 'node:path';
+
+export const prerender = false;
+
+const DATA_DIR = process.env.DATA_DIR || path.join(process.cwd(), 'app', 'data');
+
+export const GET: APIRoute = async () => {
+  let volumeStatus = 'ok';
+
+  try {
+    // Prüfe Schreib- und Lesezugriff auf /app/data/
+    await fs.mkdir(DATA_DIR, { recursive: true });
+    const testFile = path.join(DATA_DIR, '.healthcheck');
+    await fs.writeFile(testFile, 'ok', 'utf-8');
+    await fs.unlink(testFile);
+  } catch {
+    volumeStatus = 'error_data_volume_unwritable';
+  }
+
+  const isHealthy = volumeStatus === 'ok';
+
+  return new Response(
+    JSON.stringify({
+      status: isHealthy ? 'healthy' : 'unhealthy',
+      uptime: process.uptime(),
+      timestamp: new Date().toISOString(),
+      volume_status: volumeStatus,
+      node_version: process.version,
+    }),
+    {
+      status: isHealthy ? 200 : 503,
+      headers: { 'Content-Type': 'application/json' },
+    }
+  );
+};