fix: add VITE_OIDC_REDIRECT_URI and build args for frontend

- Add VITE_OIDC_REDIRECT_URI to .env.example and docker-compose files
- Pass OIDC variables as build args in Dockerfile (build-time only)
- Update both docker-compose.prod.yml and docker-compose.traefik.yml
- Fixes undefined OIDC variables causing 404 on login redirect

docker-compose.prod.yml

@@ -42,10 +42,16 @@ services:
     build:
       context: ./apps/web
       dockerfile: Dockerfile
+      args:
+        - VITE_API_URL=${VITE_API_URL:-http://localhost:8000}
+        - VITE_OIDC_ISSUER=${VITE_OIDC_ISSUER}
+        - VITE_OIDC_CLIENT_ID=${VITE_OIDC_CLIENT_ID}
+        - VITE_OIDC_REDIRECT_URI=${VITE_OIDC_REDIRECT_URI:-https://${ROOT_DOMAIN:-localhost}/callback}
     environment:
       - VITE_API_URL=${VITE_API_URL:-http://localhost:8000}
       - VITE_OIDC_ISSUER=${VITE_OIDC_ISSUER}
       - VITE_OIDC_CLIENT_ID=${VITE_OIDC_CLIENT_ID}
+      - VITE_OIDC_REDIRECT_URI=${VITE_OIDC_REDIRECT_URI:-https://${ROOT_DOMAIN:-localhost}/callback}
     depends_on:
       - api
     networks: