Update local install instructions (#1527)

Author: davidemyers

README.md

@@ -14,7 +14,7 @@ Algo VPN is a set of Ansible scripts that simplify the setup of a personal IPSEC
 * Blocks ads with a local DNS resolver (optional)
 * Sets up limited SSH users for tunneling traffic (optional)
 * Based on current versions of Ubuntu and strongSwan
-* Installs to DigitalOcean, Amazon Lightsail, Amazon EC2, Vultr, Microsoft Azure, Google Compute Engine, Scaleway, OpenStack, or your own Ubuntu server
+* Installs to DigitalOcean, Amazon Lightsail, Amazon EC2, Vultr, Microsoft Azure, Google Compute Engine, Scaleway, OpenStack, or [your own Ubuntu server](docs/deploy-to-ubuntu.md)
 
 ## Anti-features
 

docs/deploy-to-ubuntu.md

@@ -1,13 +1,11 @@
-# Local deployment
+# Local Installation
 
-You can use Algo to configure a local server as an AlgoVPN rather than create and configure a new server on a cloud provider.
+You can use Algo to configure a pre-existing server as an AlgoVPN rather than using it create and configure a new server on a supported cloud provider. This is referred to as a **local** installation rather than a **cloud** deployment.
 
-Install the Algo scripts on your server and follow the normal installation instructions, then choose:
+Install the Algo scripts following the normal installation instructions, then choose:
 ```
 Install to existing Ubuntu 18.04 or 19.04 server (Advanced)
 ```
-Make sure your server is running the operating system specified.
+Make sure your target server is running an unmodified copy of the operating system version specified. The target can be the same system where you've installed the Algo scripts, or a remote system that you are able to access as root via SSH without needing to enter the SSH key passphrase (such as when using `ssh-agent`).
 
-**PLEASE NOTE**: Algo is intended for use as a _dedicated_ VPN server. If you install Algo on an existing server, then any existing services might break. In particular, the firewall rules will be overwritten. See [AlgoVPN and Firewalls](/docs/firewalls.md) for more information.
-
-If you don't want to overwrite the rules you must deploy via `ansible-playbook` and skip the `iptables` tag as described in [deploy-from-ansible.md](deploy-from-ansible.md), after which you'll need to implement the necessary rules yourself.
+**PLEASE NOTE**: Algo is intended for use to create a _dedicated_ VPN server. No uninstallation option is provided. If you install Algo on an existing server any existing services might break. In particular, the firewall rules will be overwritten. See [AlgoVPN and Firewalls](/docs/firewalls.md) for more information.