Hi,
we are using that commands in my vps Server my server configuration is:
2 GB Memory / 50 GB Disk / NYC1 - Ubuntu 14.04.5 x64
./autogen.sh
./configure --without-miniupnpc --disable-wallet --disable-upnp-default --disable-tests --disable-hardening --disable-debug --with-libressl CPPFLAGS="-I ...