We have written a small tutorial on how to rebuild Squid 4.4 from Debian Unstable on Ubuntu 16 LTS.
It is available here –
The scripts are stored in github repo at
https://github.com/diladele/squid-ubuntu/tree/master/src/ubuntu16, hopefully might be helpful for someone. Unfortunately no plans to publish online repo for the DEBs for now (use squid44.diladele.com if you are ok with going to Ubuntu 18).
Web Filter deployed in Microsoft Azure? Surely possible, see https://azuremarketplace.microsoft.com/en-us/marketplace/apps/diladele.websafety?tab=Overview