I want docker to listen to "http://localhost/user" and forward to "http://portal.local/user" using traefik - docker

Question

I've got my docker environment setup using traefik and I've got two services running at the moment.
I'm using Google OAuth for authentication which redirects to my web application with auth-code. The redirect URL isn't allowed anything but localhost or localhost:<any-port> or any CDN. I've setup my docker for http://portal.local.
I now want http://localhost/user/googleLogin?code=xxxxxxxxxx to be translated to http://portal.local/user/googleLogin?code=xxxxxxxx for further processing of authentication.
Right now, I'm having to manually change localhost to portal.local in browser URL after it gives site not found error, which then takes me to further processing.
Below is my docker-compose.yml file.
version: "3.9"
services:
portal-traefik:
container_name: portal-traefik
command:
- --api.insecure=true
- --providers.docker=true
- --providers.docker.exposedbydefault=false
- --entrypoints.web.address=:80
# - --entrypoints.websecure.address=:443
# - --certificatesresolvers.myresolver.acme.httpchallenge=true
# - --certificatesresolvers.myresolver.acme.httpchallenge.entrypoint=web
# - --certificatesresolvers.myresolver.acme.email=ssl#idealsalessolutions.com
# - --certificatesresolvers.myresolver.acme.storage=/acme/acme.json
image: traefik:latest
networks:
api_driven:
ports:
- "80:80"
- "8080:8080"
# - "443:443"
restart: unless-stopped
volumes:
- portal_acme:/acme
- /var/run/docker.sock:/var/run/docker.sock:ro
api-i4f:
container_name: api-i4f
depends_on:
- php-i4f
- portal-traefik
image: nginx:stable-alpine
labels:
- traefik.enable=true
- traefik.http.routers.api.rule=Host(`api.local`)
networks:
api_driven:
restart: unless-stopped
volumes:
- ../docker.sites/api.local:/usr/share/nginx/api.local
- ./conf/nginx/conf.d:/etc/nginx/conf.d:ro
command: [nginx, '-g', 'daemon off;']
hostname: api.local
portal-i4f:
container_name: portal-i4f
depends_on:
- php-i4f
- portal-traefik
image: nginx:stable-alpine
labels:
- traefik.enable=true
- traefik.http.routers.portal.rule=Host(`portal.local`)
networks:
api_driven:
restart: unless-stopped
volumes:
- ../docker.sites/portal.local:/usr/share/nginx/portal.local
- ./conf/nginx/conf.d:/etc/nginx/conf.d:ro
command: [nginx, '-g', 'daemon off;']
hostname: portal.local
php-i4f:
container_name: php-i4f
depends_on:
- portal-traefik
image: isshub/core:php7.4.30-fpm-alpine3.16-intl-mysql
networks:
api_driven:
restart: unless-stopped
volumes:
- ../docker.sites/api.local:/usr/share/nginx/api.local
- ../docker.sites/portal.local:/usr/share/nginx/portal.local
networks:
api_driven:
name: "api_driven"
volumes:
portal_acme:
I've tried to use multiple router rules to listen to both localhost and portal.local using regex/replacement middlewares as well but that stops the service at all and gives 404 error.