pleroma/installation/pleroma-apache.conf

<VirtualHost *:80>
    #Example configuration for when Apache httpd and Pleroma are on the same host.
    #Needed modules: proxy proxy_http proxy_wstunnel rewrite
    #This assumes a Debian style Apache config. Put this in /etc/apache2/sites-available
    #Doesn't include SSL, just run certbot and let it take care of that.
    
    
    #Change this:
    ServerName pleroma.example.com
    
    RewriteEngine On
    RewriteCond %{HTTP:Connection} Upgrade [NC]
    RewriteCond %{HTTP:Upgrade} websocket [NC]
    RewriteRule /(.*) ws://localhost:4000/$1 [P,L]
    
    ProxyRequests off
    ProxyPass / http://localhost:4000/
    ProxyPassReverse / http://localhost:4000/
    
    #Change this too:
    RequestHeader set Host "pleroma.example.com"
    ProxyPreserveHost On
    
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>