Add proxy documentation

docs/source/index.rst

@@ -102,6 +102,7 @@ To get started, press Next.
     resources/TextFormatting
     resources/UpdateHandling
     resources/ErrorHandling
+    resources/ProxyServer
 
 .. toctree::
     :hidden:

docs/source/resources/ProxyServer.rst

@@ -0,0 +1,29 @@
+Proxy Server
+============
+
+Pyrogram supports SOCKS5 proxies with and without authentication. This feature allows Pyrogram to exchange data with
+Telegram through an intermediate SOCKS5 proxy server.
+
+Usage
+-----
+
+To use Pyrogram with a proxy, simply append the following to your ``config.ini`` file and replace the values
+with your own settings:
+
+.. code-block:: ini
+
+    [proxy]
+    enabled = True
+    hostname = 11.22.33.44
+    port = 1080
+    username = <your_username>
+    password = <your_password>
+
+-   To enable or disable the proxy without deleting your settings from the config file,
+    change the ``enabled`` value as follows:
+
+        -   ``1``, ``yes``, ``True`` or ``on``: Enables the proxy
+        -   ``0``, ``no``, ``False`` or ``off``: Disables the proxy
+
+-   If your proxy doesn't require authorization you can omit username and password by either leaving the values blank
+    or completely delete the lines.