Update Readme

- It is quite simple to build this now since it is just a freestanding
  zephyr application.

Signed-off-by: Ayush Singh <ayush@beagleboard.org>

README.md

@@ -4,4 +4,42 @@
 
 This Zephyr application is being developed as a part of Google Summer of Code 2023. It removes the need to use GBridge (which is an userspace application) in the Beagleplay Greybus setup. 
 
-This should be used in conjunction with [beagleplay-greybus-driver](https://git.beagleboard.org/gsoc/greybus/beagleplay-greybus-driver).
+This should be used in conjunction with [gb-beagleplay](https://github.com/torvalds/linux/blob/9d9a2f29aefdadc86e450308ff056017a209c755/drivers/greybus/gb-beagleplay.c).
+
+# Setup
+
+If this is your first time using zephyr, [Install Zephyr SDK](https://docs.zephyrproject.org/latest/develop/getting_started/index.html#install-the-zephyr-sdk) before following the steps below.
+
+1. Create a workspace folder:
+
+```shell
+mkdir greybus-host
+cd greybus-host
+```
+
+2. Setup virtualenv
+
+```shell
+python -m venv .venv
+source .venv/bin/activate
+pip install west
+```
+
+3. Setup Zephyr app:
+
+```shell
+west init -m https://openbeagle.org/gsoc/greybus/cc1352-firmware.git .
+west update
+```
+
+4. Install python deps
+
+```shell
+pip install -r zephyr/scripts/requirements-base.txt
+```
+
+# Build
+
+```shell
+west build -b beagleconnect_freedom cc1352-firmware -p
+```