Update docs

README.md

@@ -14,14 +14,16 @@
 
 ## To build Firmware locally using Docker
 
-### Setup
+### First run
 
-1. Execute `setup.sh`.
+1. Execute `make all`.
+2. Check the `firmware` directory for the latest firmware build.
 
-### Build firmware
+### Subsequent runs
 
-1. Execute `run.sh`
-2. Check the `firmware` directory for the latest firmware build.
+If the only file you have changed is `config/adv360.keymap`, execute `make build` and check the `firmware` directory for the latest firmware build.
+
+If you have changed other files in the `config` directory (such as `config/west.yml`) you will need to execute `make all` to rebuild the Docker image as well as the firmware.
 
 ### Flash firmware