Update README.md

Author: lukstep

README.md

@@ -1,18 +1,21 @@
 # Raspberry Pi Pico Docker SDK
 
-## Run Docker container
+Lightweight Raspberry Pi Pico C++ SDK container.
 
-```
-docker build ./docker --tag pico-sdk
+## Pull container from Docker Hub and run
 
-docker run -d -it --name pico-sdk --mount type=bind,source=${PWD},target=/home/dev pico-sdk
+The latest version of the image is stored on [Docker Hub](https://hub.docker.com/repository/docker/lukstep/raspberry-pi-pico-sdk/general)
+and can be used for container runs.
+Commands below show how to run a container, using an image from Docker Hub
+```
+docker run -d -it --name pico-sdk --mount type=bind,source=${PWD},target=/home/dev lukstep/raspberry-pi-pico-sdk:latest
 
 docker exec -it pico-sdk /bin/sh
 ```
 
-## Project build
+The directory from which the `docker run` command was called will be mounted to /home/dev in the container. 
+So after attaching to the SDK container you can build your project following the steps:
 
-After attaching to SDK container run the following command to build the project:
 ```
 cd /home/dev
 
@@ -21,5 +24,19 @@ mkdir build
 cd build
 
 cmake .. && make -j4
+```
+
+## Build image and run container:
+
+To build your own SDK image, You need to clone this repository and run the following commands:
 
 ```
+cd raspberry-pi-pico-docker-sdk
+
+docker build . --tag pico-sdk
+
+docker run -d -it --name pico-sdk --mount type=bind,source=${PWD},target=/home/dev pico-sdk
+
+docker exec -it pico-sdk /bin/sh
+```
+