We created a new volume group\logical volume called /opt/sannav and then installed everything to there.
Run the ./install... from /opt/sannav/Portal..../bin/
When it asked for where the docker install should go we choose /opt/sannav/var/lib
# ls -ld /sannavswapfile
-rw------- 1 root root 15728640000 Dec 19 12:24 /sannavswapfile
# du -sh /sannavswapfile