Formatting for reverse-proxy docs (#7514)

also a small clarification to nginx

changelog.d/7514.doc

@@ -0,0 +1 @@
+Improve the formatting of `reverse_proxy.md`.

docs/reverse_proxy.md

@@ -34,97 +34,107 @@ the reverse proxy and the homeserver.
 
 ### nginx
 
-        server {
-            listen 443 ssl;
-            listen [::]:443 ssl;
-            server_name matrix.example.com;
+```
+server {
+    listen 443 ssl;
+    listen [::]:443 ssl;
+    server_name matrix.example.com;
 
-            location /_matrix {
-                proxy_pass http://localhost:8008;
-                proxy_set_header X-Forwarded-For $remote_addr;
-                # Nginx by default only allows file uploads up to 1M in size
-                # Increase client_max_body_size to match max_upload_size defined in homeserver.yaml
-                client_max_body_size 10M;
-            }
-        }
+    location /_matrix {
+        proxy_pass http://localhost:8008;
+        proxy_set_header X-Forwarded-For $remote_addr;
+        # Nginx by default only allows file uploads up to 1M in size
+        # Increase client_max_body_size to match max_upload_size defined in homeserver.yaml
+        client_max_body_size 10M;
+    }
+}
 
-        server {
-            listen 8448 ssl default_server;
-            listen [::]:8448 ssl default_server;
-            server_name example.com;
+server {
+    listen 8448 ssl default_server;
+    listen [::]:8448 ssl default_server;
+    server_name example.com;
 
-            location / {
-                proxy_pass http://localhost:8008;
-                proxy_set_header X-Forwarded-For $remote_addr;
-            }
-        }
+    location / {
+        proxy_pass http://localhost:8008;
+        proxy_set_header X-Forwarded-For $remote_addr;
+    }
+}
+```
 
-> **NOTE**: Do not add a `/` after the port in `proxy_pass`, otherwise nginx will
+**NOTE**: Do not add a path after the port in `proxy_pass`, otherwise nginx will
 canonicalise/normalise the URI.
 
 ### Caddy 1
 
-        matrix.example.com {
-          proxy /_matrix http://localhost:8008 {
-            transparent
-          }
-        }
+```
+matrix.example.com {
+  proxy /_matrix http://localhost:8008 {
+    transparent
+  }
+}
 
-        example.com:8448 {
-          proxy / http://localhost:8008 {
-            transparent
-          }
-        }
+example.com:8448 {
+  proxy / http://localhost:8008 {
+    transparent
+  }
+}
+```
 
 ### Caddy 2
 
-        matrix.example.com {
-          reverse_proxy /_matrix/* http://localhost:8008
-        }
+```
+matrix.example.com {
+  reverse_proxy /_matrix/* http://localhost:8008
+}
 
-        example.com:8448 {
-          reverse_proxy http://localhost:8008
-        }
+example.com:8448 {
+  reverse_proxy http://localhost:8008
+}
+```
 
 ### Apache
 
-        <VirtualHost *:443>
-            SSLEngine on
-            ServerName matrix.example.com;
+```
+<VirtualHost *:443>
+    SSLEngine on
+    ServerName matrix.example.com;
 
-            AllowEncodedSlashes NoDecode
-            ProxyPass /_matrix http://127.0.0.1:8008/_matrix nocanon
-            ProxyPassReverse /_matrix http://127.0.0.1:8008/_matrix
-        </VirtualHost>
+    AllowEncodedSlashes NoDecode
+    ProxyPass /_matrix http://127.0.0.1:8008/_matrix nocanon
+    ProxyPassReverse /_matrix http://127.0.0.1:8008/_matrix
+</VirtualHost>
 
-        <VirtualHost *:8448>
-            SSLEngine on
-            ServerName example.com;
+<VirtualHost *:8448>
+    SSLEngine on
+    ServerName example.com;
 
-            AllowEncodedSlashes NoDecode
-            ProxyPass /_matrix http://127.0.0.1:8008/_matrix nocanon
-            ProxyPassReverse /_matrix http://127.0.0.1:8008/_matrix
-        </VirtualHost>
+    AllowEncodedSlashes NoDecode
+    ProxyPass /_matrix http://127.0.0.1:8008/_matrix nocanon
+    ProxyPassReverse /_matrix http://127.0.0.1:8008/_matrix
+</VirtualHost>
+```
 
-> **NOTE**: ensure the  `nocanon` options are included.
+**NOTE**: ensure the  `nocanon` options are included.
 
 ### HAProxy
 
-        frontend https
-          bind :::443 v4v6 ssl crt /etc/ssl/haproxy/ strict-sni alpn h2,http/1.1
+```
+frontend https
+  bind :::443 v4v6 ssl crt /etc/ssl/haproxy/ strict-sni alpn h2,http/1.1
 
-          # Matrix client traffic
-          acl matrix-host hdr(host) -i matrix.example.com
-          acl matrix-path path_beg /_matrix
+  # Matrix client traffic
+  acl matrix-host hdr(host) -i matrix.example.com
+  acl matrix-path path_beg /_matrix
 
-          use_backend matrix if matrix-host matrix-path
+  use_backend matrix if matrix-host matrix-path
 
-        frontend matrix-federation
-          bind :::8448 v4v6 ssl crt /etc/ssl/haproxy/synapse.pem alpn h2,http/1.1
-          default_backend matrix
+frontend matrix-federation
+  bind :::8448 v4v6 ssl crt /etc/ssl/haproxy/synapse.pem alpn h2,http/1.1
+  default_backend matrix
 
-        backend matrix
-          server matrix 127.0.0.1:8008
+backend matrix
+  server matrix 127.0.0.1:8008
+```
 
 ## Homeserver Configuration