Fix Dockerfile: Add --user flag, ca-certificates, and improve gdown with --fuzzy flag

Dockerfile

@@ -4,14 +4,16 @@ FROM python:3.10-slim
 # Create non-root user
 RUN useradd -m -u 1000 user
 
-# Set working directory
+# Set working directory and permissions
 WORKDIR /app
+RUN chown -R user:user /app
 
 # Install system dependencies for OpenCV (minimal)
 RUN apt-get update && apt-get install -y --no-install-recommends \
     libgl1 \
     libglib2.0-0 \
     wget \
+    ca-certificates \
     && rm -rf /var/lib/apt/lists/* \
     && apt-get clean
 
@@ -21,14 +23,16 @@ COPY --chown=user:user requirements.txt ./
 # Switch to user before installing Python packages
 USER user
 ENV PATH="/home/user/.local/bin:$PATH"
+ENV HOME=/home/user
 
 # Install Python dependencies with optimizations
-RUN pip install --no-cache-dir -r requirements.txt && \
+RUN pip install --no-cache-dir --user -r requirements.txt && \
     pip cache purge
 
-# Download model checkpoint from Google Drive
-RUN pip install --no-cache-dir gdown && \
-    gdown --id 1ftzxTJUnlxpQFqPlaUozG_JUbl1Qi5tQ -O /app/model_checkpoint.ckpt && \
+# Download model checkpoint from Google Drive (with retries)
+RUN pip install --no-cache-dir --user gdown && \
+    gdown --fuzzy --id 1ftzxTJUnlxpQFqPlaUozG_JUbl1Qi5tQ -O /app/model_checkpoint.ckpt && \
+    ls -lh /app/model_checkpoint.ckpt && \
     pip uninstall -y gdown && \
     pip cache purge
 
@@ -37,10 +41,10 @@ COPY --chown=user:user app.py inference_core.py ./
 COPY --chown=user:user scripts/ ./scripts/
 COPY --chown=user:user configs/ ./configs/
 
-# Create output directories
-RUN mkdir -p api_inference_pred_masks_pipeline \
-    api_inference_filtered_pipeline \
-    api_inference_labeled_boxes_pipeline
+# Create output directories with proper permissions
+RUN mkdir -p /app/api_inference_pred_masks_pipeline && \
+    mkdir -p /app/api_inference_filtered_pipeline && \
+    mkdir -p /app/api_inference_labeled_boxes_pipeline
 
 # Expose port for Hugging Face Spaces
 EXPOSE 7860