fix custom stage and add readme

README_AURACAST_SYSTEM.md

@@ -1,2 +1,10 @@
 # Build
-- Always use the docker build script
+- Always use the docker build script
+ - sudo CONTINUE=1 bash build-docker.sh
+
+ # System
+- this builds a 'lite' version of the system, featuring also basic development tools
+- deactivate wifi and bluetooth (wifi can be deactivated, bt has bt-disable overlay)
+- install docker
+- install poetry
+- install wireguard

stage2.1_custom/00-install/00-run.sh

@@ -4,8 +4,10 @@ set -e
 # Install Docker (official instructions for Raspberry Pi OS)
 curl -fsSL https://download.docker.com/linux/raspbian/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
 
+apt-get update && apt-get install -y lsb-release
+
 echo \
-  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/raspbian \
+  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian \
   $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
 apt-get update
 apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
@@ -13,6 +15,8 @@ apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
 docker compose version || true
 
 # Install Python Poetry (official installer)
+apt-get update
+apt-get install -y python3
 curl -sSL https://install.python-poetry.org | python3 - 
 
 # Install WireGuard