Adds app whitelabling feature from kmountainflower site dumps

.devcontainer/Dockerfile

@@ -4,7 +4,7 @@ ENV PATH="$PATH:/opt/flutter/bin"
 
 # Install system dependencies
 RUN apt-get update && apt-get install -y \
-    wget curl unzip git xz-utils zip cmake clang pkg-config mesa-utils lld libgtk-3-dev ninja-build libglu1-mesa openjdk-17-jdk\
+    wget curl unzip git xz-utils zip cmake clang pkg-config mesa-utils python3 pip pipx lld libgtk-3-dev ninja-build libglu1-mesa openjdk-17-jdk\
     && rm -rf /var/lib/apt/lists/*
 
 # Become non-root