Add ConfigurationFile.rst

docs/source/index.rst

@@ -88,6 +88,7 @@ To get started, press the Next button.
     resources/UpdateHandling
     resources/UsingFilters
     resources/MoreOnUpdates
+    resources/ConfigurationFile
     resources/SmartPlugins
     resources/AutoAuthorization
     resources/CustomizeSessions

docs/source/resources/ConfigurationFile.rst

@@ -0,0 +1,73 @@
+Configuration File
+==================
+
+As already mentioned in previous sections, Pyrogram can also be configured by the use of an INI file.
+This page explains how this file is structured in Pyrogram, how to use it and why.
+
+Introduction
+------------
+
+The idea behind using a configuration file is to help keeping your code free of settings (private) information such as
+the API Key and Proxy without having you to even deal with how to load such settings. The configuration file, usually
+referred as ``config.ini` file, is automatically loaded from the root of your working directory; all you need to do is
+fill in the necessary parts.
+
+.. note::
+
+    The configuration file is optional, but recommended. If, for any reason, you prefer not to use it, there's always an
+    alternative way to configure Pyrogram via Client's parameters. Doing so, you can have full control on how to store
+    and load your settings (e.g.: from environment variables).
+
+    Settings specified via Client's parameter have higher priority and will override any setting stored in the
+    configuration file.
+
+
+The config.ini File
+-------------------
+
+By default, Pyrogram will look for a file named ``config.ini`` placed at the root of your working directory, that is, in
+the same folder of your running script. You can change the name or location of your configuration file by specifying
+that in your Client's parameter *config_file*.
+
+-   Replace the default *config.ini* file with *my_configuration.ini*:
+
+    .. code-block:: python
+
+        from pyrogram import Client
+
+        app = Client("my_account", config_file="my_configuration.ini")
+
+
+Configuration Sections
+----------------------
+
+There are all the sections Pyrogram uses in its configuration file:
+
+Pyrogram
+^^^^^^^^
+
+The ``pyrogram`` section is used to store Telegram credentials, namely the API Key, which consists of two parts:
+*api_id* and *api_hash*.
+
+.. code-block:: ini
+
+    [pyrogram]
+    api_id = 12345
+    api_hash = 0123456789abcdef0123456789abcdef
+
+`More info <../start/Setup.html#configuration>`_
+
+Proxy
+^^^^^
+
+The ``proxy`` section contains settings about your SOCKS5 proxy.
+
+.. code-block:: ini
+
+    [proxy]
+    enabled = True
+    hostname = 11.22.33.44
+    port = 1080
+    username = <your_username>
+    password = <your_password>
+