# command to installing apache + certbot
sudo apt install apache2 python3-certbot-apache
# generate the let's encrypt certificate with certbot

# enable some needed modules
sudo a2enmod rewrite ssl proxy_http proxy_connect proxy_wstunnel

# this is a example configuration for using in VirtualHost of Apache config
# https://stackoverflow.com/questions/19294816/is-it-possible-to-ignore-an-apache-proxyd-certificate
# https://stackoverflow.com/questions/27526281/websockets-and-apache-proxy-how-to-configure-mod-proxy-wstunnel
SSLProxyEngine on
SSLProxyCheckPeerCN off
SSLProxyCheckPeerExpire off
ProxyPreserveHost on
RewriteEngine on
RewriteCond %{HTTP:Upgrade} =websocket [NC]
RewriteRule ^/viaaas/(.*)           wss://localhost:25543/$1 [P,L]
RewriteCond %{HTTP:Upgrade} !=websocket [NC]
RewriteRule ^/viaaas/(.*)           https://localhost:25543/$1 [P,L]