move Docker instructions into docs/

README.md

@@ -33,7 +33,7 @@ If compared to saving websites with `wget -mpk`, this tool embeds all assets as
     $ snap install monolith
 
 #### Via Docker
-The guide can be found [here](https://github.com/Y2Z/monolith/wiki/Using-containers)
+The guide can be found [here](docs/containers.md)
 
 ---------------------------------------------------
 

docs/containers.md

@@ -0,0 +1,15 @@
+1. Run `docker build -t y2z/monolith .` to create a Docker image
+
+2. Create a file named `monolith` which contains:
+```sh
+#!/bin/sh
+
+docker run --rm \
+    y2z/monolith \
+    monolith \
+    "$@"
+```
+3. Make the file executable (`chmod +x monolith`) and include it into your `$PATH`
+4. Now you should be able to run a containerized build of monolith like this:  
+`monolith -I https://github.com > document.html`
+