Basic reverse proxy configs.

Reverse Proxy (Apache)

<VirtualHost *:80>
    ServerName example.com
    ErrorLog /var/log/httpd/example.com-error.log
    CustomLog /var/log/httpd/example.com-access.log combined

    ProxyRequests Off
    ProxyVia Block
    ProxyPreserveHost On

    <Proxy *>
         Require all granted
    </Proxy>

    ProxyPass / http://localhost:8080/
    ProxyPassReverse / http://localhost:8080/
</VirtualHost>

Reverse Proxy (Caddy)

example.com

proxy / localhost:8080 {
    header_upstream X-Forwarded-Proto {scheme}
    header_upstream X-Forwarded-Host {host}
    header_upstream Host {host}
}

Reverse Proxy (Nginx)

server {
 listen 80;
 server_name example.com;

 # To allow special characters in headers
 ignore_invalid_headers off;
 # Allow any size file to be uploaded.
 # Set to a value such as 1000m; to restrict file size to a specific value
 client_max_body_size 0;
 # To disable buffering
 proxy_buffering off;

 location / {
   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 Host $http_host;

   proxy_connect_timeout  300;
   # Default is HTTP/1, keepalive is only enabled in HTTP/1.1
   proxy_http_version 1.1;
   proxy_set_header Connection "";

   proxy_pass http://localhost:8080;
 }
}