two port nginx config

nginx_http.config

upstream old_rails_puma {
    server old_app:3000;
}

upstream new_rails_puma {
    server new_app:4000
}

# Old Rails server config, listen 80 port
server {
    listen 80;
    root /app/old/public;
    access_log /var/log/nginx/nginx.access.log;
    error_log /var/log/nginx/nginx.error.log;

    try_files $uri/index.html $uri @rails_puma;

    location @old_rails_puma {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $host;
        # proxy_set_header X-Forwarded-Proto https;
        proxy_pass http://old_rails_puma;
        proxy_redirect off;
    }

    # static content
    location ~ ^/(assets|img|js|javascripts|styles|stylesheets)/ {
        access_log        off;
        # Per RFC2616 - 1 year maximum expiry
        expires max;
        add_header Cache-Control public;

        # Some browsers still send conditional-GET requests if there's a
        # Last-Modified header or an ETag header even if they haven't
        # reached the expiry date sent in the Expires header.
        add_header Last-Modified "";
        add_header ETag "";
        break;
    }

    error_page 500 502 503 504 /500.html;
    client_max_body_size 4G;
    keepalive_timeout 10;
}

# New Rails server config, listen 8080 port
server {
    listen 8080;
    root /app/new/public;
    access_log /var/log/nginx/nginx.access.log;
    error_log /var/log/nginx/nginx.error.log;

    try_files $uri/index.html $uri @rails_puma;

    location @new_rails_puma {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $host;
        # proxy_set_header X-Forwarded-Proto https;
        proxy_pass http://new_rails_puma;
        proxy_redirect off;
    }

    # static content
    location ~ ^/(assets|img|js|javascripts|styles|stylesheets)/ {
        access_log        off;
        # Per RFC2616 - 1 year maximum expiry
        expires 1y;
        add_header Cache-Control public;

        # Some browsers still send conditional-GET requests if there's a
        # Last-Modified header or an ETag header even if they haven't
        # reached the expiry date sent in the Expires header.
        add_header Last-Modified "";
        add_header ETag "";
        break;
    }

    error_page 500 502 503 504 /500.html;
    client_max_body_size 4G;
    keepalive_timeout 10;
}