Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. It reduces bandwidth and improves response times by caching and reusing frequently-requested web pages. Squid has extensive access controls and makes a great server accelerator. It runs on most available operating systems, including Windows and is licensed under the GNU GPL.
Docker images for Squid, latest official version
Arm Raspberry and X86
https://hub.docker.com/repository/docker/fredbcode/squid/general