Cookies set on development, but not on production

Describe the bug

2 Docker containers:

Server: Express.JS REST API with JWT authentication.
Client: Next.JS app that uses Axios to talk with the server.

I tested it on localhost with Docker Compose: Everything working fine (both Postman and the browser successfully store the token as a cookie to use on subsequent requests.).

I deployed it to Google Cloud Run (one service for each container). Everything working fine except that now only requests made through Postman are storing the token as a cookie.

The browser (the Next.JS app) no longer does the same, even though the request returns a successful response there is no token in the browser cookies.

I did some research, found a few similar problems, and the solutions usually involve setting up some CORS configurations, so I updated my code by adding these configurations, but the issue remains.

I am currently trying it like this:

Server-side:

export const login = async (req: Request, res: Response) => {

...

  const accessToken = jwt.sign({ username, id, isAdmin }, jwtSecret, {
    expiresIn: "12h",
  });

  res
    .status(200)
    .cookie("accessToken-Myapp", accessToken, {
      secure: true,
      sameSite: "none",
    })
    .end();
};

const app = express();

app.use(helmet());
app.use(
  rateLimit({
    max: 300,
    windowMs: 60 * 60 * 1000,
    message: "Please try again later!",
  })
);

const corsConfig = {
  origin: true,
  credentials: true,
  allowedHeaders: ["Content-Type", "Authorization"],
};

app.use(cors(corsConfig));
app.options("*", cors(corsConfig));

app.use(express.json());
app.use(cookieParser());
app.use("/images", express.static("images"));

app.get("/health", (_, res: Response) => res.sendStatus(200));
app.use("/api/v1/auth", authRouter);

Client-side:

import axios from "axios";

export default axios.create({
  baseURL: `https://my-cloud-run-server-container-address/api/v1/`,
  withCredentials: true,
});

To Reproduce

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Code snippet

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Expected behavior

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Axios Version

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Adapter Version

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Browser

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Browser Version

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Node.js Version

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OS

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Additional Library Versions

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Additional context/Screenshots

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axios / axios