Fix Docker git permissions (#14995)

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

docker/Dockerfile-runner

@@ -5,6 +5,14 @@
 # Start FROM Ultralytics GPU image
 FROM ultralytics/ultralytics:latest
 
+# Set environment variables
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PIP_BREAK_SYSTEM_PACKAGES=1 \
+    RUNNER_ALLOW_RUNASROOT=1 \
+    DEBIAN_FRONTEND=noninteractive
+
 # Set the working directory
 WORKDIR /actions-runner
 
@@ -15,9 +23,7 @@ RUN FILENAME=actions-runner-linux-x64-2.317.0.tar.gz && \
     rm $FILENAME
 
 # Install runner dependencies
-ENV RUNNER_ALLOW_RUNASROOT=1
-ENV DEBIAN_FRONTEND=noninteractive
-RUN pip install --no-cache-dir pytest-cov
+RUN pip install pytest-cov
 RUN ./bin/installdependencies.sh && \
     apt-get -y install libicu-dev