Merge branch 'update-readme' into 'develop'

Update README with missing instructions

See merge request ekzyis/musicube!30

Makefile

@@ -14,3 +14,6 @@ build:
 		--build-arg DISCORD_LOG_CHANNEL_CLEAR_ON_STARTUP=${DISCORD_LOG_CHANNEL_CLEAR_ON_STARTUP} \
 		-t musicube:${GIT_COMMIT} -t musicube:latest \
 		.
+
+run:
+	docker run --rm --detach --name musicube musicube:latest

README.md

@@ -20,6 +20,7 @@ Install requirements:
 
 ```
 $ pip install -r requirements.txt
+$ pacman -S ffmpeg
 ```
 
 Configure ENV:
@@ -54,11 +55,12 @@ There is NO WARRANTY, to the extent permitted by law.
 Build image:
 
 ```
+$ cp .env docker.env
 $ make build
 ```
 
 Run image:
 
 ```
-$ docker run --rm --detach --name musicube musicube:latest
+$ make run
 ```