Update comments in necessary Nginx configs

Author: JonasAlfredsson

src/nginx_conf.d/certbot.conf

@@ -1,11 +1,11 @@
 server {
-    # Listen only on the local host, port 81
+    # Listen only on port 81 for localhost, and nothing else.
     server_name 127.0.0.1;
     listen 127.0.0.1:81 default_server;
 
     charset utf-8;
 
-    # Certbot's folder used for challenge response
+    # Certbot's folder used for the ACME challenge response.
     location ^~ /.well-known/acme-challenge {
         default_type text/plain;
         root /var/www/letsencrypt;

src/nginx_conf.d/redirector.conf

@@ -1,10 +1,11 @@
 server {
-    # Listen on plain old HTTP and catch any hostname for redirect to HTTPS
+    # Listen on plain old HTTP and catch all requests so they can be redirected
+    # to HTTPS instead.
     listen 80 default_server reuseport;
     listen [::]:80 default_server reuseport;
 
-    # Pass this particular URL off to the certbot server for it to be able to
-    # authenticate with letsencrypt and get the HTTPS certificates.
+    # Pass this particular URL off to the certbot server so it can properly
+    # respond to the Let's Encrypt ACME challenges for the HTTPS certificates.
     location '/.well-known/acme-challenge' {
         default_type "text/plain";
         proxy_pass http://localhost:81;