update the newly created instance

sudo apt update -y

Install rtpengine dependecies

sudo apt-get install debhelper iptables-dev libcurl4-openssl-dev 
libpcre3-dev libxmlrpc-core-c3-dev markdown libavfilter-dev 
libavformat-dev libavresample-dev libevent-dev libglib2.0-dev libhiredis-dev 
libjson-glib-dev libpcap0.8-dev libpcap-dev libssl-dev dkms module-assistant