dockerfile updates

Dockerfile

@@ -1,6 +1,6 @@
 FROM nvcr.io/nvidia/pytorch:25.03-py3
 
-ARG TZ="America/Los_Angeles"
+ENV TZ="Etc/UTC"
 
 ENV PYTORCH_CUDA_ALLOC_CONF="backend:cudaMallocAsync"
 ENV UV_COMPILE_BYTECODE=1
@@ -9,23 +9,29 @@ ENV UV_SYSTEM_PYTHON=1
 ENV UV_BREAK_SYSTEM_PACKAGES=1
 ENV PIP_DISABLE_PIP_VERSION_CHECK=1
 ENV PIP_NO_CACHE_DIR=1
-ENV DEBIAN_FRONTEND="noninteractive"
+ENV DEBIAN_FRONTEND=noninteractive
+
+ENV LANG=C.UTF-8
+ENV LC_ALL=C.UTF-8
+
 # mitigates
 # RuntimeError: Failed to import transformers.generation.utils because of the following error (look up to see its traceback):
 # numpy.dtype size changed, may indicate binary incompatibility. Expected 96 from C header, got 88 from PyObject
 RUN echo "numpy<2" >> numpy-override.txt
 
-# mitigates https://stackoverflow.com/questions/55313610/importerror-libgl-so-1-cannot-open-shared-object-file-no-such-file-or-directo
 # mitigates AttributeError: module 'cv2.dnn' has no attribute 'DictValue' \
 # see https://github.com/facebookresearch/nougat/issues/40
-RUN pip install uv && uv --version && \
-    apt-get update && apt-get install --no-install-recommends ffmpeg libsm6 libxext6 -y && \
+RUN apt-get update && \
+    apt-get install --no-install-recommends -y tzdata ffmpeg libsm6 libxext6 && \
+    pip install uv && uv --version && \
+    apt-get purge -y --auto-remove tzdata && \
     rm -rf /var/lib/apt/lists/*
+
 RUN uv pip uninstall --system $(pip list --format=freeze | grep opencv) && \
     rm -rf /usr/local/lib/python3.12/dist-packages/cv2/ && \
     uv pip install --no-build-isolation opencv-python-headless
-RUN uv pip install --overrides=numpy-override.txt "comfyui[attention,comfyui_manager]@git+https://github.com/hiddenswitch/ComfyUI.git" && \
 
+RUN uv pip install --overrides=numpy-override.txt "comfyui[attention,comfyui_manager]@git+https://github.com/hiddenswitch/ComfyUI.git"
 
 WORKDIR /workspace
 # addresses https://github.com/pytorch/pytorch/issues/104801