vroom/docs/httpd/httpd_alias.conf

<IfModule mod_proxy_wstunnel.c>
  ProxyPass /socket.io/1/websocket ws://localhost:8090/socket.io/1/websocket
  ProxyPassReverse /socket.io/1/websocket ws://localhost:8090/socket.io/1/websocket
</IfModule>
ProxyPass /socket.io/ http://localhost:8090/socket.io/
ProxyPassReverse /socket.io/ http://localhost:8090/socket.io/

# Etherpad example
# If you install etherpad on the same box, listening on its default
# port (9001) and want it to be accessible on /etherpad/
# <IfModule mod_proxy_wstunnel.c>
#   ProxyPass /etherpad/socket.io/1/websocket ws://localhost:9001/socket.io/1/websocket
#   ProxyPassReverse /etherpad/socket.io/1/websocket ws://localhost:9001/socket.io/1/websocket
# </IfModule>
# ProxyPass /etherpad/ http://localhost:9001/
# ProxyPassReverse /etherpad/ http://localhost:9001/

ProxyPass /vroom/ http://127.0.0.1:8090/ Keepalive=on
ProxyPassReverse /vroom/ http://127.0.0.1:8090/
<Proxy /vroom/*>
  ProxyPreserveHost On
</Proxy>
<Directory /opt/vroom>
  SSLRequireSSL on
  require all granted
</Directory>
<Location />
  <IfModule mod_deflate.c>
    AddOutputFilterByType DEFLATE text/html text/plain text/xml text/javascript text/css
    SetOutputFilter DEFLATE
    BrowserMatch ^Mozilla/4 gzip-only-text/html
    BrowserMatch ^Mozilla/4.0[678] no-gzip
    BrowserMatch ^HMSIE !no-gzip !gzip-only-text/html
    SetEnvIfNoCase Request_URI .(?:gif|jpe?g|png)$ no-gzip dont-vary
  </IfModule>
  <IfModule mod_headers.c>
    Header append Vary User-Agent env=!dont-vary
    Header unset ETag
  </IfModule>
  ExpiresActive on
  ExpiresDefault                     "access plus 1 month"
  ExpiresByType text/html            "access plus 0 seconds"
</Directory>
# You should customize this part to access the admin interface
# VROOM doesn't handle authentication, it's up to you to protect
# /vroom/admin on your web server
<Location /vroom/admin>
  require local
</Location>
<Location /socket.io>
  SSLRequireSSL on
</Location>