Confirm that the cookie is set without Traefik by running the react app in the web-app folder and the go server. You will see that the cookie can be set.
You will need to adjust the following lines:
In the React App:
// app.js
fetch("http://api.localhost").then((res=> console.log(res)));
// To:
fetch("http://localhost:8089").then((res=> console.log(res)));On the Go server:
//main.go
panic(http.ListenAndServe("0.0.0.0:8089", r))To run, from the "traefik-min-repro" folder, run docker-compose up, and then docker-compose build.
Go to api.localhost or app.localhost and you will see that no cookies are set.