How to dockerize react with django and nginx?

everyone I'm working on a small project where I already did the backend and nginx configuration with docker
Now I want to add frontend created by react this is the project architecture

    Docker-compose
    Dockerfile (1)
    docker (folder)
       -proxy (folder)
          -nginx (folder)
              -default-ssl.conf.tpl
          - frontend (folder)
          -Dockerfile (2)



When I run the docker command it builds successfully, all the endpoint (https:xxx.xx/api) and backend api are working but when I type my website https://xxx.xx it doesn't work it shows an empty white page
Any help please?

this is the docker-compose :

    version: '3.9'
    services:
    db:
      image: postgres
      volumes:
        - ./data/db:/var/lib/postgresql/data
        - ./init.sql:/docker-entrypoint-initdb.d/init.sql
      environment:
        - POSTGRES_DB=xxx
        - POSTGRES_USER=xxx
        - POSTGRES_PASSWORD=xxx
    app:
      build:
      context: .
      restart: always
      volumes:
        - .:/app
      environment:
        - DJANGO_DEBUG=0
        - POSTGRES_NAME=xxx
        - POSTGRES_USER=xxx
        - POSTGRES_PASSWORD=xxx
        - DJANGO_SECRET_KEY=${DJANGO_SECRET_KEY}
        - DJANGO_ALLOWED_HOSTS=${DOMAIN}
      depends_on:
        - db
    
    redis:
      image: redis:alpine
      
    proxy:
      build:
        context: ./docker/proxy
      restart: always
      depends_on:
        - app
      ports:
        - 80:80
        - 443:443
      volumes:
        - certbot-web:/vol/www
        - proxy-dhparams:/vol/proxy
        - certbot-certs:/etc/letsencrypt
      environment:
        - DOMAIN=${DOMAIN}

    certbot:
      build:
        context: ./docker/certbot
      command: echo "Skipping..."
      environment:
        - EMAIL=${ACME_DEFAULT_EMAIL}
        - DOMAIN=${DOMAIN}
      volumes:
        - certbot-web:/vol/www
        - certbot-certs:/etc/letsencrypt/
      depends_on:
        - proxy

    volumes:
     certbot-web:
     proxy-dhparams:
     certbot-certs:


Dockerfile (2):

    
     FROM node:13.12.0-alpine as build

     WORKDIR /app/frontend
     COPY ./frontend/package.json /app/frontend
     COPY ./frontend/package-lock.json /app/frontend
     COPY ./frontend/ /app/frontend
     RUN npm install --silent
     RUN npm install react-scripts@3.0.1 -g --silent 
     RUN npm run build 

     FROM nginx:1.23.0-alpine
     WORKDIR /usr/share/nginx/html
     RUN rm -rf ./*

     COPY ./nginx/* /etc/nginx/
     COPY ./run.sh /run.sh
     COPY --from=build /app/frontend/build /usr/share/nginx/html

     ENV APP_HOST=app
     ENV APP_PORT=8001

     USER root

     RUN apk add --no-cache openssl bash
     RUN chmod +x /run.sh

     VOLUME /vol/static
     VOLUME /vol/www
     CMD ["/run.sh"]


This is the default-ssl.conf.tpl

    server {
      listen 80;
      server_name ${DOMAIN} www.${DOMAIN};

      location /.well-known/acme-challenge/ {
          root /vol/www/;
      }

    location / {
        return 301 https://$host$request_uri;
    }
    }

    server {
      listen      443 ssl http2;
      server_name ${DOMAIN} www.${DOMAIN};

      ssl_certificate     /etc/letsencrypt/live/${DOMAIN}/fullchain.pem;
      ssl_certificate_key /etc/letsencrypt/live/${DOMAIN}/privkey.pem;

      include     /etc/nginx/options-ssl-nginx.conf;

      ssl_dhparam /vol/proxy/ssl-dhparams.pem;

      add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
      location /static {
          alias /vol/static;
      }

    location / {
        root   /usr/share/nginx/html;
        index  index.html index.htm;
        try_files $uri $uri/ /index.html;
    }

    location /api {
        try_files $uri @proxy_api;
    }
    location /wss/ {
        try_files $uri @proxy_api;
    }
    location @proxy_api {
        proxy_pass http://${APP_HOST}:${APP_PORT};
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $http_connection;
     }

     location /django_static/ {
        autoindex on;
        alias /app/backend/server/django_static/;
      }
    
     }