CORS is not working with Traefik

Traefik Traefik v3 (latest)
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2

Maybe check the Traefik headers middleware doc again, this works for us:

      - traefik.http.middlewares.cors.headers.customresponseheaders.Access-Control-Allow-Origin=*
      - traefik.http.middlewares.cors.headers.customresponseheaders.Access-Control-Allow-Methods=GET,POST,OPTIONS
      - traefik.http.middlewares.cors.headers.customresponseheaders.Access-Control-Allow-Headers=*