fix: 404 unknown API routes, add .dockerignore

- Add catch-all 404 handler for unknown /api/* routes after API mounts
- Unauthed requests to unknown API paths now return 401, authed return 404
- Add .dockerignore to prevent leaking data/ (DB, secret.key), .git/, node_modules/
- Add test in auth.test.ts verifying unknown /api/nope returns 401 unauthed, 404 authed

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

server/src/app.ts

@@ -21,6 +21,7 @@ export function createApp(deps: Deps) {
   app.route("/api", authRoutes({ db: deps.db }));
   app.route("/api", settingsRoutes(deps));
   // Later route groups (connectors, chat) mount here.
+  app.all("/api/*", (c) => c.json({ error: "not found" }, 404));
   app.use("/*", serveStatic({ root: "./web/dist" }));
   app.get("/*", serveStatic({ path: "./web/dist/index.html" }));
   return app;

server/test/auth.test.ts

@@ -52,4 +52,19 @@ describe("auth", () => {
     }
     expect(last).toBe(429);
   });
+
+  test("unknown /api/* returns 404 when authed, 401 when unauthed", async () => {
+    const app = makeApp();
+    await app.request("/api/setup", json({ password: "hunter2hunter2" }));
+
+    // Unauthed request to unknown endpoint returns 401
+    expect((await app.request("/api/nope")).status).toBe(401);
+
+    // Authed request to unknown endpoint returns 404
+    const login = await app.request("/api/login", json({ password: "hunter2hunter2" }));
+    const cookie = login.headers.get("set-cookie")!;
+    const res = await app.request("/api/nope", { headers: { cookie } });
+    expect(res.status).toBe(404);
+    expect(await res.json()).toEqual({ error: "not found" });
+  });
 });