refactor: update ports to use 80 for front-end services in Docker and Nginx configuration

nest-front/Dockerfile

@@ -19,7 +19,7 @@ FROM nginx:alpine
 COPY --from=build /app/dist /usr/share/nginx/html
 COPY nginx.conf /etc/nginx/nginx.conf.template
 
-EXPOSE 5173
+EXPOSE 80
 
 # API_URL is the backend's public base URL used by nginx proxy_pass.
 # Set this at runtime in Coolify, e.g. API_URL=https://api.crowmate.fr