Add info about certbot with the webroot plugin to pleroma.nginx

installation/pleroma.nginx

@@ -4,7 +4,7 @@
 # 1. Install your TLS certificate, possibly using Let's Encrypt.
 # 2. Replace 'example.tld' with your instance's domain wherever it appears.
 # 3. Copy this file to /etc/nginx/sites-available/ and then add a symlink to it
-#    in /etc/nginx/sites-enabled/ and restart nginx.
+#    in /etc/nginx/sites-enabled/ and run 'nginx -s reload' or restart nginx.
 
 proxy_cache_path /tmp/pleroma-media-cache levels=1:2 keys_zone=pleroma_media_cache:10m max_size=10g
                  inactive=720m use_temp_path=off;
@@ -13,6 +13,15 @@ server {
     listen         80;
     server_name    example.tld;
     return         301 https://$server_name$request_uri;
+
+    # Uncomment this if you need to use the 'webroot' method with certbot. Make sure
+    # that you also create the .well-known/acme-challenge directory structure in pleroma/priv/static and
+    # that is is accessible by the webserver. You may need to load this file with the ssl
+    # server block commented out, run certbot to get the certificate, and then uncomment it.
+    #
+    # location ~ /\.well-known/acme-challenge {
+    #     root <path to install>/pleroma/priv/static/;
+    # }
 }
 
 server {