docs: add comments

Author: luckspt

load-balancers/haproxy.template.cfg

@@ -23,6 +23,7 @@ frontend hvt-frontend from hvt-defaults
     acl letsencrypt-acl path_beg /.well-known/acme-challenge/
     use_backend letsencrypt-backend if letsencrypt-acl
 
+    # Redirect to https if using http
     http-request redirect scheme https unless { ssl_fc }
 
     stats enable
@@ -35,6 +36,7 @@ frontend hvt-frontend from hvt-defaults
 
     default_backend hvt-web
 
+# Proxy to letsencrypt backend
 backend letsencrypt-backend from hvt-defaults
     server certbot host.docker.internal:8888