Adds README and screenshot

README.md

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+# QueueCube
+
+QueueCube is a web frontend for [mpv](https://github.com/mpv-player/mpv).
+
+It allows you to remotely manage mpv's playqueue as well as the ability to search YouTube via a locally running [Invidious](https://github.com/iv-org/invidious) instance. 
+
+![queuecube user interface](screenshots/queuecube.png)
+
+## Running 
+
+The easiest way to run QueueCube is by using Docker. An MPV instance is created in the Docker container, so all you have to do is make it so the MPV instance can access your host's soundcard. On Linux, this is accomplished by mapping the PulseAudio socket to the container:
+
+```
+volumes:
+    - ~/.config/pulse/cookie:/root/.config/pulse/cookie
+    - /var/run/user/1000/pulse:/var/run/pulse
+```
+
+### Building the Docker image
+
+```
+docker build -t queuecube:latest .
+```
+
+If not using docker-compose, create an instance of the container by using `docker create` using the volume mapping specified above for mapping the PulseAudio socket:
+
+```
+docker create -p 8080:3000 -v /run/user/1000/pulse:/var/run/pulse -v ~/.config/pulse/cookie:/root/.config/pulse/cookie --name queuecube queuecube:latest
+```
+
+On some systems, you may need to add `--security-opt seccomp=unconfined` to allow containerized processes to write to your host's PulseAudio socket. 
+
+Once running, you should be able to access the UI via http://localhost:8080. 
+