nginx.conf

user nginx;
worker_processes auto;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;
events {
    worker_connections  1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    client_max_body_size 10M;

    upstream backend {
        server backend_container:8080;      # docker-compose.yml에서 올라가는 컨테이너명으로 작성.
        keepalive 1024;
    }

    server {
        listen 80;              # nginx를 통해 외부로 노출되는 port

        location / {
            # root를 /usr/share/nginx/html 을 바라보게 했으므로(Dockerfile 참고)
            # 해당 경로 아래에 배포해주면 됨
            root   /usr/share/nginx/html;
            index  index.html;
            try_files $uri /index.html;
        }

        location /api {
           rewrite ^/api(.*)$ $1?$args break;
           proxy_pass         http://backend;
        }


    }
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    keepalive_timeout  65;

}