Add instructions

Author: f0086

case/README.md

@@ -1,5 +1,11 @@
 # Build instructions
 
-See here for guidance: https://aaron-fischer.net/cah
+The case is built with Clojure and the scad-clj lib, which will generate
+OpenSCAD files. This files can then be converted to SVG with the OpenSCAD viewer
+(save as). The STL files itself can then convert to GCode files with Slic3r or
+your prefered slicing tool. To understand the process, you can read this article (de): https://aaron-fischer.net/cah
 
+# Author
 
+Aaron Fischer
+https://aaron-fischer.net/