Merge pull request #462 from tadeubas/readme-docker-addition

README info about add user to docker group before using ./krux build

README.md

@@ -41,7 +41,7 @@ git pull origin main && git submodule update --init --recursive
 ```
 
 ## Krux (script) (Linux or WSL)
-The [krux](krux) bash script contains commands for common development tasks. It assumes a Linux host, you will need to have [Docker Desktop or Docker Engine](https://docs.docker.com/desktop/), `openssl`, and `wget` installed at a minimum for the commands to work as expected. It works on Windows using WSL. The channel Crypto Guide from Youtube made a step-by-step video - [Krux DIY Bitcoin Signer: Build From Source & Verify (With Windows + WSL2 + Docker)](https://www.youtube.com/watch?v=Vmr_TFy2TfQ)
+The [krux](krux) bash script contains commands for common development tasks. It assumes a Linux host, you will need to have [Docker Desktop or Docker Engine](https://docs.docker.com/desktop/) (don't forget to add your user to the docker group `sudo usermod -aG docker $USER`), `openssl`, and `wget` installed at a minimum for the commands to work as expected. It works on Windows using WSL. The channel Crypto Guide from Youtube made a step-by-step video - [Krux DIY Bitcoin Signer: Build From Source & Verify (With Windows + WSL2 + Docker)](https://www.youtube.com/watch?v=Vmr_TFy2TfQ)
 
 To build and flash the firmware:
 ```bash