Avoid unsafe git error when container user and file config volume permissions don't match (#6843)

docker/Dockerfile

@@ -100,6 +100,9 @@ RUN --mount=type=tmpfs,target=/root/.cargo if [ "$TARGETARCH$TARGETVARIANT" = "a
     --break-system-packages --no-cache-dir -r /requirements.txt -r /requirements_optional.txt \
     && /platformio_install_deps.py /platformio.ini --libraries
 
+# Avoid unsafe git error when container user and file config volume permissions don't match
+RUN git config --system --add safe.directory '/config/*'
+
 
 # ======================= docker-type image =======================
 FROM base AS docker