README: Add more details to instructions.

README.md

@@ -1,10 +1,23 @@
-# Algo VPN Driver Scripts
+# Algo VPN Driver Script
 
-Some driver scripts for [Algo][algo-gh]. How to use:
+Some driver scripts for [Algo][algo-gh]. Although Algo's installation process is
+already very easy to use, I wanted something that didn't require user
+interaction.
 
-1. In `config.cfg` put your name under `users`.
-2. Paste the entire script into your provider's cloud-init box when creating
+## Features
+
+- Installs Algo's dependencies.
+- Installs other useful tools, such as `htop`.
+- Finds parameters to pass into Algo, such as the IP address.
+
+## Usage
+
+1. Paste the entire script into your provider's cloud-init box when creating
    your VPS.
+2. If you want to use the SSH tunnel, make sure the provider will write keys to
+   `/root/.ssh/authorized_keys`.
+3. Log into the server and wait for a .mobileconfig file to appear in
+   `/root/algo/configs/`.
 
 If you're just experimenting, you can launch a free DigitalOcean instance for 2
 hours using [dply.co](https://dply.co/).