updated dockerfile and protobuf installation

Dockerfile

@@ -1,40 +1,31 @@
 FROM python:3.9-slim
 
-# Install system dependencies for OpenCV and TFOD Protobuf
+# Install system dependencies
 RUN apt-get update && apt-get install -y \
     build-essential \
-    python3-dev \
     libgl1 \
-    libglx-mesa0 \
     libglib2.0-0 \
     protobuf-compiler \
     git \
-    wget \
     && rm -rf /var/lib/apt/lists/*
 
-# Set up a new user 
 RUN useradd -m -u 1000 user
 USER user
 ENV HOME=/home/user \
     PATH=/home/user/.local/bin:$PATH \
     PYTHONPATH=$HOME/app:$HOME/app/models/research:$HOME/app/models/research/slim
-
 WORKDIR $HOME/app
 
-# Install Python dependencies
-COPY --chown=user requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
-
-# Clone and install TensorFlow Object Detection API
 RUN git clone --depth 1 https://github.com/tensorflow/models.git
 WORKDIR $HOME/app/models/research
 RUN protoc object_detection/protos/*.proto --python_out=.
+
 RUN cp object_detection/packages/tf2/setup.py . && \
-    python -m pip install --use-deprecated=legacy-resolver .
+    python -m pip install --no-cache-dir .
 
 WORKDIR $HOME/app
+COPY --chown=user requirements.txt .
+RUN pip install --no-cache-dir -U -r requirements.txt
 
-# Copy the rest of the application
 COPY --chown=user . .
-
 CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]