pip upgrade happens later inside the venv; used git config to ignore detached head warnings

Dockerfile

@@ -33,11 +33,7 @@ RUN apt-get update -y \
         libssl-dev \
         libffi-dev \
         aria2 \
-    \
-    && pip3 install --upgrade pip \
-    \
     && git lfs install \
-    \
     && apt-get clean autoclean \
     && apt-get autoremove --yes \
     && rm -rf /var/lib/apt/lists/*
@@ -79,6 +75,9 @@ WORKDIR /app
 COPY --chown=user:user pyproject.toml poetry.lock /app/
 RUN poetry install
 
+# turn the detached message off
+RUN git config --global advice.detachedHead false
+
 # AUTOMATIC1111' WebUI
 RUN git clone https://github.com/AUTOMATIC1111/stable-diffusion-webui /app/stable-diffusion-webui \
     && (cd /app/stable-diffusion-webui && git checkout 5ef669de080814067961f28357256e8fe27544f4)