readme: Add usage section

README.md

@@ -8,6 +8,70 @@ Part of a project funded by the Wownero community. Thank you :)
 
 See the [WFS Proposal][] for more info.
 
+## Usage
+
+### Setup
+
+1. Install ansible if you don't have it already.
+   You can do this in a virtualenv if you don't want to install it system-wide.
+   
+	```bash
+	python -m venv virtualenv
+	pip install -r requirements.txt
+	```
+
+2. Configure the inventory.
+   Modify `inventory.ini` with the connection details of your server.
+
+3. Run the playbook.
+   
+	```bash
+	ansible-playbook -i inventory.ini site.yaml
+	```
+
+4. Enjoy your daemon!
+
+### Further Configuration
+
+The P2P and RPC listening ports can be configured with the variables
+`wownerod_p2p_port` and `wownerod_rpc_port` respectively.
+
+You can set them for a single host in your inventory like this:
+
+```ini
+daemon.example.com wownerod_p2p_port=12345 wownerod_rpc_port=12346
+```
+
+Or you can set them for all hosts:
+
+```ini
+[all]
+daemon.example.com
+daemon2.example.com
+
+[all:vars]
+wownerod_p2p_port=12345
+wownerod_rpc_port=12346
+```
+
+### Upgrading `wownerod`
+
+Edit `wownerod_remote_url`, `wownerod_remote_hash`, and
+`wownero_version` in `roles/wownerod/defaults/main.yaml` to point to a
+newer `wownerod` binary and re-run the playbook. It is recommended to
+test the update on a single host first before deploying to the rest of
+the pool.
+
+Will be updated to use the official release binaries in the future,
+but they currently do not support distros with an older version of
+glibc (e.g. Debian Stable) so a binary built on Debian 10 is provided.
+
+### HA Notice
+
+The RPC server works great when behind HAProxy, nginx, or a DNS
+solution like Constellix. However you'll need to extend the playbook
+yourself for that.
+
 ## License
 
 Released under the terms of the [Unlicense][].