Reverse Proxy in apache

proxy.conf

#If ot backfires, do this first
#a2enmod proxy
#a2enmod proxy_http

#/etc/apache2/sites-available/abcd.conf
<VirtualHost *:80>
 ServerAdmin webmaster@localhost
 ServerName mySite
 ServerAlias www.abcd.com
DocumentRoot /var/www/html/abcd
 <Directory />
 Options -Indexes +FollowSymLinks
 AllowOverride None
 Require all granted
 </Directory>
ProxyRequests Off
 ProxyPreserveHost On
 ProxyVia Full
 <Proxy *>
 Require all granted
 </Proxy>
<Location /nodejsApp>
 ProxyPass http://127.0.0.1:8080
 ProxyPassReverse http://127.0.0.1:8080
 </Location>
ErrorLog ${APACHE_LOG_DIR}/error.log
# Possible values include: debug, info, notice, warn, error, crit,
 # alert, emerg.
 LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>