Ever frustrated with endless fetching from docker hub / other registry?

How to

{YOUR_HOST_IP} must be replaced by your host ip in all files/configs/commands mentioned below
docker-compose up -d
set HTTP_PROXY for your docker for example with: systemd edit docker.service and put there something like
```
[Service]
Environment=HTTP_PROXY=http://{YOUR_HOST_IP}:3128/
```
adjust and copy daemon.json to /etc/docker/daemon.json (merge if needed, or use systemctl drop-ins)
execute systemctl restart docker.service
run caches with docker-compose up -d

What it actually does

It spawns squid as caching http/https server and HTTP_PROXY will be set correctly for all your docker executions
It spawns docker pull through mirror for docker hub requests: https://docs.docker.com/registry/recipes/mirror/#gotcha
Requests to mutable objects are not cached (so :latest works fine)
Only HTTP GET is cached

Wipe cache

rm -fr squid_cache to remove squid cache
rm -fr registry_cache to remove registry mirror cache