reverse proxy setting wordpress, about certbot snap and acme.sh

Note for building 2+ tier web server

reverse proxy wordpress note: 
fastcgi_param HTTPS 1;
taken frrom:
Fixing a NGINX Wordpress HTTP 302 redirect loop - Austin's Nerdy Things (austinsnerdythings.com)
nyxi – Wordpress Nginx redirect loop

omit comments on files

 egrep -v '^[[:blank:]]*#|^[[:blank:]]*$' <file_name>

taken from:

https://stackoverflow.com/questions/17392869/how-to-print-a-file-excluding-comments-and-blank-lines-using-grep-sed