add use procedure

Author: erwin-lau

README.md

@@ -3,11 +3,16 @@
 This is built by poet. Please install poet from https://github.com/StanzaOrg/poet
 
 Usage: `svg-to-stanza <name-without-file-extension> [span-in-mm] [stroke-width-in-mm] [ressolution-in-mm]`
+
 If no span, stroke-width or resolution is given, they are default to 10mm, 0.1mm, and 0.01mm respectively.
 
-Once the .stanza file is generated, you can move it to your jitpcb design directory 
-and use it by following the instruction in the .stanza file.
+1. clone this repo
+2. use `poet build` to create an executable
+3. run the executable against your .svg file. e.g. `svg-to-stanza mirmo`
+4. once the .stanza file is generated, you can move it to your jitpcb design directory 
+5. use the .stanza file by following the instructions in the .stanza file comments.
+6. update your design's `stanza.proj` if necessary.
 
 ![alt text](svg-to-stanza-mirmo.png)
 
-Dec 2022
+Dec 2022