Docker registry with read only access

This is the configuration for a docker registry UI using REGISTRY_URL (as a proxy) with read only access to the registry.

There are two htpasswd files. read-write.htpasswd a read and write access to the registry and read-only.htpasswd for a read only access.

All users in read-only.htpasswd should be in read-write.htpasswd.

Read only user: login: read password: regisrty. Read and write user: login: write password: regisrty.