nginx.conf

http {
    upstream webmap {
        server webmap:8081;
    }

    upstream api {
        server api:8080;
    }

    server {
        listen 80;

        location / {
            proxy_pass http://webmap;

            add_header 'Access-Control-Allow-Origin' '*';
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE';
            add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization';
            add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';
        }

        location /api {
            proxy_pass http://api;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;

            add_header 'Access-Control-Allow-Origin' '*';
            add_header 'Access-Control-Allow-Methods' '*';
            add_header 'Access-Control-Allow-Headers' '*';
            add_header 'Access-Control-Expose-Headers' '*';
        }
    }
}

events {}