CORS for Traefik Reverse Proxy: Copy-Paste Reference
CORS in Traefik is mostly a headers middleware problem. Once you get that, the config becomes pretty mechanical. The annoying part is that browsers are strict, Traefik is flexible, and bad examples online often mix app-level CORS with proxy-level CORS. I usually prefer handling CORS at the edge in Traefik when multiple services need the same behavior. It keeps backend apps simpler and avoids five different teams all inventing slightly broken header logic. ...