fix: update Dockerfile for Hugging Face Spaces - use port 7860 and follow HF Spaces best practices

Dockerfile

@@ -0,0 +1,63 @@
+# Read the doc: https://huggingface.co/docs/hub/spaces-sdks-docker
+# GPU-optimized Dockerfile for Face Swap Video API
+
+FROM nvidia/cuda:12.1.0-cudnn8-runtime-ubuntu22.04
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    python3.10 \
+    python3-pip \
+    ffmpeg \
+    libgl1-mesa-glx \
+    libglib2.0-0 \
+    git \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create user for Hugging Face Spaces (following HF Spaces best practices)
+RUN useradd -m -u 1000 user
+USER user
+ENV PATH="/home/user/.local/bin:$PATH"
+
+# Set working directory
+WORKDIR /app
+
+# Copy requirements file
+COPY --chown=user ./requirements.txt requirements.txt
+
+# Install Python dependencies (excluding Gradio for API-only mode)
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir --user \
+    fastapi>=0.115.2 \
+    uvicorn[standard]==0.24.0 \
+    python-multipart>=0.0.18 \
+    motor==3.3.2 \
+    pymongo==4.6.0 \
+    python-dotenv==1.0.0 \
+    dnspython==2.4.2 \
+    numpy==1.24.3 \
+    insightface==0.7.3 \
+    onnxruntime-gpu==1.17.3 \
+    opencv-python \
+    psutil==5.9.5 \
+    tqdm==4.65.0 \
+    Pillow \
+    moviepy==1.0.3 \
+    imageio-ffmpeg \
+    huggingface_hub>=0.23.0
+
+# Copy application code
+COPY --chown=user . /app
+
+# Create upload directories with proper permissions
+RUN mkdir -p uploads/source_images uploads/target_videos uploads/result_videos uploads/output && \
+    chmod -R 755 uploads
+
+# Set environment variables
+ENV PYTHONUNBUFFERED=1
+ENV CUDA_VISIBLE_DEVICES=0
+
+# Expose port 7860 (required for Hugging Face Spaces)
+EXPOSE 7860
+
+# Run the API server on port 7860 (HF Spaces requirement)
+CMD ["uvicorn", "api_server:app", "--host", "0.0.0.0", "--port", "7860"]

api_server.py

@@ -434,4 +434,4 @@ async def root():
 
 if __name__ == "__main__":
     import uvicorn
-    uvicorn.run(app, host="0.0.0.0", port=8000)
+    uvicorn.run(app, host="0.0.0.0", port=7860)