Add documentation files

docs/AUTO_STARTING.md

@@ -0,0 +1,23 @@
+# Auto-starting DrawIt
+
+After you know that DrawIt is up and running, you should have a mechanism that auto-start the service.
+
+## SystemD
+
+A common way to auto-start a service is to use systemd. There is a [dedicated file](SYSTEMD.md) for how to use this method.
+
+## PM2
+
+Another way to start the service is using something called PM2. This can be used for any npm/node project.
+
+### Guide
+
+1. Install PM2: `npm install pm2`
+2. Install PM2 Logrotate: `npm install pm2-logrotate`
+3. Start the server: `pm2 start npm --name "drawit" -- start`
+
+You should now be running your very own DrawIt instance!
+
+## Additional reading
+
+After you know *it works!*, you should set up a [reverse proxy](REVERSE_PROXIES.md).