Add build instructions

README.md

@@ -8,3 +8,6 @@ Pip-Boy inspired phone holder built around the PINE64 PinePhone.
  - OpenScad
  - [BOSL library](https://github.com/revarbat/BOSL)
 
+## Build Instructions
+See [Instructions Readme](instructions/README.md).
+

instructions/README.md

@@ -0,0 +1,22 @@
+# Instructions
+
+WIP!
+
+## Components
+ - PINE64 PinePhone
+ - model parts (printed on a 3D printer)
+ - nuts and bolts (?)
+ - glue (?)
+ - textile / leather strap
+ - clips for the strap
+ - ...
+
+## Steps
+ 1. Gather your components
+ 2. Slide the phone into the *right* component  
+   ![Step 01 01](step_01_01.jpg)
+ 3. Slide the *left* component onto the phone
+ 4. Cover the phone with the *top* harness component  
+   ![Step 01 02](step_01_02.jpg)
+ 5. DONE!
+