nginx.conf

worker_processes 1;

events { worker_connections 1024; }

http {

    upstream app {
        server email-generator-service:8443;
    }

    server {
        listen 443 ssl;

        ssl_certificate /etc/nginx/certs/nginx.crt;
        ssl_certificate_key /etc/nginx/certs/nginx.key;

        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers 'ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384';
        ssl_prefer_server_ciphers on;

        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

        location /app {
            proxy_pass https://app;
            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;
            proxy_set_header X-Forwarded-Port 9443;

            # don't leak any escaped errors from the internal service
            proxy_intercept_errors on;

            # proxy timeouts for reaching the backend service
            proxy_connect_timeout 5s;
            proxy_send_timeout 10s;
            proxy_read_timeout 10s;
        }

        location /swagger-ui {
            proxy_pass https://app;
            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;
            proxy_set_header X-Forwarded-Port 9443;

            # don't leak any escaped errors from the internal service
            proxy_intercept_errors on;

            # proxy timeouts for reaching the backend service
            proxy_connect_timeout 5s;
            proxy_send_timeout 10s;
            proxy_read_timeout 10s;
        }

        location /v3 {
            proxy_pass https://app;
            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;
            proxy_set_header X-Forwarded-Port 9443;

            # don't leak any escaped errors from the internal service
            proxy_intercept_errors on;

            # proxy timeouts for reaching the backend service
            proxy_connect_timeout 5s;
            proxy_send_timeout 10s;
            proxy_read_timeout 10s;
        }

        # Capture unexpected errors gracefully
        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
            root /usr/share/nginx/html;
            internal;
        }
    }
}