make github codespaces work

.devcontainer/Dockerfile

@@ -6,5 +6,6 @@ FROM mcr.microsoft.com/vscode/devcontainers/base:0-${VARIANT}
 
 # [Optional] Uncomment this section to install additional OS packages.
 RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
-     && apt-get -y install python3-distutils
+     && apt-get -y install python3-distutils python3-pip
+RUN pip3 install platformio meshtastic adafruit-nrfutil
 RUN wget https://github.com/protocolbuffers/protobuf/releases/download/v3.15.8/protoc-3.15.8-linux-x86_64.zip -O /tmp/protoc.zip && cd /tmp && unzip protoc.zip && chmod a+x bin/protoc && cp bin/protoc /usr/local/bin