Add sample C project

README.md

@@ -1,4 +1,4 @@
-# Raspberry Pi Pico Docker
+# Raspberry Pi Pico Docker SDK
 
 ## Run Docker container
 
@@ -9,3 +9,17 @@ docker run -d -it --name pico-sdk --mount type=bind,source=${PWD},target=/home/d
 
 docker exec -it pico-sdk /bin/sh
 ```
+
+## Project build
+
+After attaching to SDK container run the following command to build the project:
+```
+cd /home/dev
+
+mkdir build
+
+cd build
+
+cmake .. && make -j4
+
+```