this error occured.

Environment : docker-compose, vue, spring, mysql, redis

docker works on oracle cloud server. because i deployed.

docker-compose.yml

version: '3.8'
services:
  app-mysql:
    image: mysql:8.0
    environment:
      MYSQL_ROOT_PASSWORD: 1234 <---example
      MYSQL_DATABASE: data
    volumes:
      - ./db/mysql/data:/var/lib/mysql
    ports:
      - '3306:3306'
    networks:
      - app-network
    restart: always
    healthcheck:
      test: ["CMD", "mysqladmin", "ping", "-h", "localhost"]
      timeout: 30s
      retries: 10

  redis:
    container_name: redis
    image: redis:latest
    ports:
      - '6380:6380'
    networks:
      - app-network

  vue:
    container_name: front
    image: frontimage
    environment:
      VITE_API_URL: http://spring:8088/
    ports:
      - '80:80'
      - '443:443'
    restart: always
    networks:
      - app-network

  spring:
    container_name: spring
    image: backimage
    ports:
      - '8088:8088'
    environment:
      DB_PASSWORD: 1234
      DB_USER: root
      DB_URL: jdbc:mysql://app-mysql:3306/data?useSSL=false&allowPublicKeyRetrieval=true
      JWT_SECRET: 1d5b94681dec98b3623a7827a489076cd2e28065d110034c27c17b360a39ae5d
      REDIS_HOST: redis
    depends_on:
      - app-mysql
      - redis
    restart: always
    networks:
      - app-network

networks:
  app-network:
    driver: bridge

default.conf

server {
    listen 80;
    server_name viewgorithm.site;
    location / {
        root /usr/share/nginx/html;
        index index.html;
        try_files $uri $uri/ /index.html;
    }
    location /user {
        proxy_pass http://spring:8088;
    }
    location /algorithm {
        proxy_pass http://spring:8088;
    }
    location /user/post {
        proxy_pass http://spring:8088;
    }
    location /logout {
        proxy_pass http://spring:8088;
    }
}

.env

VITE_BASE_URL:http://spring:8088/

i changed docker network.

bridge -> host

but it’s not working.

And spring project is no problem.

i think cors is fine.

.cors(c -> {
                            CorsConfigurationSource source = request -> {
                                var cors = new CorsConfiguration();
                   
                                cors.addAllowedOriginPattern("*");
       
                                cors.setAllowedMethods(List.of("*"));
      
                                cors.setAllowedHeaders(List.of("*"));
                                cors.setAllowCredentials(false);
                                cors.setMaxAge(3600L);
                                return cors;
                            };
                            c.configurationSource(source);
                        }
                )

Previously, I accessed it with an ip address and there was no problem. However, after applying the domain, it says that it is not possible to communicate with the spring container.