diff --git a/.gitignore b/.gitignore
index 4193d91..1c5100d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 node_modules
-_youtube
+_youtube/*
+!_youtube/.empty
 cyp.service
diff --git a/Dockerfile b/Dockerfile
index a094b15..3a522f3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,7 @@
 FROM node:10
+RUN curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl
+RUN chmod a+rx /usr/local/bin/youtube-dl
 WORKDIR /cyp
-RUN ["mkdir", "_youtube"]
 COPY package.json .
 RUN npm i
 COPY index.js .
diff --git a/Makefile b/Makefile
index 6897838..cb801f2 100644
--- a/Makefile
+++ b/Makefile
@@ -27,4 +27,10 @@ watch: all
 clean:
 	rm -f $(SERVICE) $(CSS)
 
+docker-image:
+	docker build -t cyp .
+
+docker-run:
+	docker run --network=host -v "$$(pwd)"/_youtube:/cyp/_youtube cyp
+
 .PHONY: all watch icons service clean
diff --git a/README.md b/README.md
index a596287..230d706 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,25 @@ docker build -t cyp .
 docker run --network=host cyp
 ```
 
+## Youtube-dl integration
+
+You will need a working [youtube-dl](https://ytdl-org.github.io/youtube-dl/index.html) installation. Audio files are downloaded into the `_youtube` directory, so make sure it is available to your MPD library (use a symlink).
+
+If you use Docker, you need to mount the `_youtube` directory into the image:
+
+```sh
+docker run --network=host -v "$(pwd)"/_youtube:/cyp/_youtube cyp
+```
+
+
+## Changing the port
+
+...is done via the `PORT` environment variable. If you use Docker, the `-e` switch does the trick:
+
+```sh
+docker run --network=host -e PORT=12345 cyp
+```
+
 
 ## Technology
   - Connected to MPD via WebSockets (using the [ws2mpd](https://github.com/ondras/ws2mpd/) bridge)
@@ -53,5 +72,5 @@ docker run --network=host cyp
 ## TODO
 
   - [ ] Bundling
-  - [ ] Range styling
+  - [X] Range styling
   - [ ] Browser testing
diff --git a/_youtube/.empty b/_youtube/.empty
new file mode 100644
index 0000000..e69de29
diff --git a/index.js b/index.js
index f3d8b5d..64ed29d 100644
--- a/index.js
+++ b/index.js
@@ -1,6 +1,6 @@
 const static = require("node-static");
 const app = new static.Server("./app");
-const port = Number(process.argv[2]) || 8080;
+const port = Number(process.argv[2]) || process.env.PORT || 8080;
 
 let tickets = [];