Add health and readiness endpoints

backend/main.py

@@ -28,6 +28,23 @@ app = FastAPI(title="Jellomator")
 app.add_middleware(CORSMiddleware, allow_origins=["*"], allow_credentials=True, allow_methods=["*"], allow_headers=["*"])
 
 
+@app.get("/healthz")
+def healthz():
+    return {"ok": True}
+
+
+@app.get("/readyz")
+def readyz():
+    try:
+        with db() as c:
+            with c.cursor() as cur:
+                cur.execute("select 1 as ok")
+                cur.fetchone()
+    except Exception:
+        raise HTTPException(503, "Database not ready")
+    return {"ok": True}
+
+
 @contextmanager
 def db():
     conn = pymysql.connect(