Add: Config Key when changing ffmpeg. (#80)

doc/quickstart.md

@@ -16,9 +16,9 @@ or.....
 
 ## Through docker
 
-1. Download the code.  `git clone https://github.com/gabek/owncast`
+1. Download the code: `git clone https://github.com/gabek/owncast`
 1. Copy `config-example.yaml` to `config.yaml`
-1. [Edit `config.yaml`](#configure) and change the path of ffmpeg to `/usr/bin/ffmpeg`.
+1. [Edit `config.yaml`](#configure) with a file editor of your choice and change the path of ffmpeg by appending `ffmpegPath: /usr/bin/ffmpeg` at the top level of the yaml.
 1. Edit your stream key to whatever you'd like it to be in the config.
 1. If you ever make any future config file changes you must rerun the `docker build` step otherwise you can just run the `docker run` step to run the service going forward.
 1. Run `docker build -t owncast .` and wait.  It may take a few minutes to build depending on the speed of your server.
@@ -37,4 +37,4 @@ or.....
 1. Access your server in your web browser by visiting `http://yourserver:8080`.
 
 
-### That's it!
+### That's it!