VIRTUAL_HOST needs to be decoupled from LETSENCRYPT_HOST

[futhrevo]

Mup version (mup --version): 1.4.5

VIRTUAL_HOST needs to be decoupled from LETSENCRYPT_HOST so that we see a consistent url in address bar

Where is VIRTUAL_HOST used?
For configuring jwilder/nginx-proxy

Why is VIRTUAL_HOST used?
jwilder/nginx-proxy uses this environment variable to create default.conf rules

Please refer: https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Choosing_between_www_and_non-www_URLs

Current Behaviour: mup constructs VIRTUAL_HOST based on proxy.domains. Nginx creates rules that are inconsistent with domain redirect. Consider a scenario where proxy.domains contain both non-www and www. Now Nginx constructs server blocks separately for non-www and www. Now https://example.com and https://www.example.com becomes valid. Presently it is impossible to override Nginx default.conf with shared proxy config

Expected Behaviour: separating HOST enable user to use redirect method in Nginx for a single canonical name