Add installation instructions

Makefile

@@ -1,17 +1,17 @@
 .PHONY: all clean_firmware clean_image clean
 
 all:
-	docker build --tag zmk_keiler --file Dockerfile .
-	docker run --rm -it --name zmk_keiler \
+	docker build --tag zmk_corne --file Dockerfile .
+	docker run --rm -it --name zmk_corne \
 		-v $(PWD)/firmware:/app/firmware \
 		-v $(PWD)/config:/app/config:ro \
-		zmk_keiler
+		zmk_corne
 
 clean_firmware:
-	rm -f firmware/*.uf2
+	rm -f $(PWD)/firmware/*.uf2
 
 clean_image:
-	docker image rm zmk_keiler docker.io/zmkfirmware/zmk-build-arm:stable
+	docker image rm zmk_corne docker.io/zmkfirmware/zmk-build-arm:stable
 
 clean:
 	clean_firmware

README.md

@@ -0,0 +1,12 @@
+# Corne ZMK
+
+Personal ZMK config for a [Corne](https://github.com/foostan/crkbd) variant from [Typeractive](https://github.com/typeractivexyz).
+
+Instead of having a master keyboard half which communicates with the computer, a dongle (Seeed Xiao BLE) is used which drastically increases the battery life.
+
+## Installation
+
+1. Copy the settings reset firmware onto the dongle and each keyboard half, respectively.
+2. Copy the actual firmware onto the left & right keyboard half and turn them on.
+3. Copy the actual firmware onto the dongle.
+4. If the keyboard halves do not automatically connect to the dongle, use the reset button.