Created Test Servers (markdown)

Test-Servers.md

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+To run Telethon on a test server, use the following code:
+```python
+client = TelegramClient(None, api_id, api_hash)
+client.session.server_address = '149.154.167.40'
+client.connect()
+```
+
+You can check your `'test ip'` on https://my.telegram.org.
+
+You should set `None` session so to ensure you're generating a new authorization key for it (it would fail if you used a session where you had previously connected to another data center).
+
+Once you're connected, you'll likely need to `.sign_up()`. Remember [anyone can access the phone you choose](https://core.telegram.org/api/datacenter#testing-redirects), so don't store sensitive data here:
+
+```python
+from random import randint
+
+dc_id = '2'  # Change this to the DC id of the test server you chose
+phone = '99966{}{}'.format(dc_id, str(randint(9999)).zfill(4))
+client.send_code_request(phone)
+client.sign_up(dc_id * 5, 'Some', 'Name')
+```