chore: complete README

README.md

@@ -1,4 +1,4 @@
-## Led-Matrix-UI
+## Led-Matrix-UI 
 
 WebUI to manage HUB75 LED Matrix Panels with the hzeller/rpi-rgb-led-matrix library 
 
@@ -7,14 +7,37 @@ Build with:
  * Bootstrap
  * htmx
 
-## Usage
+## Usage 
 
-Run as root to get access to the /dev GPIO
-Configure it through the app flags
+Run as ***root*** to get access to the `/dev` GPIO 
+Configure it through the app flags 
+They follow the hzeller library 
+``` 
+sudo ./matrix-led-ui-bin -h
+```
 
-## Build
+## Build 
 
-TODO
+You'll need to install [Zig](https://ziglang.org/) and Golang from your distribution package manager. 
+
+Clone the two repos: 
+ * zaggash/go-rpi-rgb-led-matrix
+ * zaggash/led-matrix-ui
+
+Move to `./go-rpi-rgb-led-matrix/lib/rpi-rgb-led-matrix/lib` and run Make 
+Then go to the `led-matrix-ui` folder and run build.sh 
+
+```
+WORKDIR=$(pwd)
+git clone https://github.com/zaggash/go-rpi-rgb-led-matrix.git
+git clone https://github.com/zaggash/led-matrix-ui.git
+cd $WORKDIR/go-rpi-rgb-led-matrix/lib/rpi-rgb-led-matrix/lib/
+make \
+ CC="zig cc -target arm-linux-gnueabihf -march=arm1176jz_s -mfpu=vfp -mfloat-abi=hard" \
+ CXX="zig c++ -target arm-linux-gnueabihf -march=arm1176jzf_s -mfpu=vfp -mfloat-abi=hard"
+
+cd $WORKDIR/led-matrix-ui/
+./build.sh
+```
 
-
 __Please feel free to report any issues or suggestions__