fix: restore DB connectivity check to auth health endpoint

Co-Authored-By: Paperclip <noreply@paperclip.ing>

auth/src/auth.ts

@@ -4,17 +4,23 @@ import pg from "pg";
 
 const { Pool } = pg;
 
-const pool = new Pool({
-  connectionString:
-    process.env.DATABASE_URL ??
-    "postgresql://cartsnitch:cartsnitch@localhost:5432/cartsnitch",
-});
-
 const secret = process.env.BETTER_AUTH_SECRET;
 if (!secret) {
   throw new Error("BETTER_AUTH_SECRET environment variable is required");
 }
 
+const databaseUrl = process.env.DATABASE_URL;
+if (!databaseUrl) {
+  console.warn(
+    "WARNING: DATABASE_URL is not set — using default localhost connection. " +
+    "Set DATABASE_URL for production deployments."
+  );
+}
+
+export const pool = new Pool({
+  connectionString: databaseUrl ?? "postgresql://cartsnitch:cartsnitch@localhost:5432/cartsnitch",
+});
+
 export const auth = betterAuth({
   database: pool,
   basePath: "/auth",

auth/src/index.ts

@@ -1,6 +1,6 @@
 import { createServer } from "node:http";
 import { toNodeHandler } from "better-auth/node";
-import { auth } from "./auth.js";
+import { auth, pool } from "./auth.js";
 
 const port = parseInt(process.env.PORT ?? "3001", 10);
 
@@ -9,8 +9,22 @@ const handler = toNodeHandler(auth);
 const server = createServer(async (req, res) => {
   // Health check
   if (req.url === "/health" && req.method === "GET") {
-    res.writeHead(200, { "Content-Type": "application/json" });
+    try {
-    res.end(JSON.stringify({ status: "ok" }));
+      const client = await pool.connect();
+      try {
+        await Promise.race([
+          client.query("SELECT 1"),
+          new Promise((_, reject) => setTimeout(() => reject(new Error("DB timeout")), 2000)),
+        ]);
+      } finally {
+        client.release();
+      }
+      res.writeHead(200, { "Content-Type": "application/json" });
+      res.end(JSON.stringify({ status: "ok", db: "connected" }));
+    } catch {
+      res.writeHead(503, { "Content-Type": "application/json" });
+      res.end(JSON.stringify({ status: "error", db: "unreachable" }));
+    }
     return;
   }