Adds usage instructions to the readme

README.md

@@ -13,3 +13,18 @@ Things it still needs:
 * Unit file to run the app
 * Configuration file for Foundry itself
 * A data directory for Foundry to use
+
+
+# Usage instructions
+
+## Assumptions
+
+* You already have a VPS running and DNS records pointing your desired domain at it.
+* You have a valid SSH key for your root user configured in your SSH agent.
+* You have Ansible installed and are reasonably familiar with it.
+
+## Steps
+
+Create a copy of the example variables file `cp variables.yml.example variables.example` and change the domain name to the correct value.
+
+Run the playbook against your server, e.g. `ansible-playbook foundry_playbook.yml -i vtt.vidja.social,` (Note the comma after the domain, this tells ansible it's an address and not an inventory file).