Fix Dockerfile: Add ffmpeg dependency

Dockerfile

@@ -1,11 +1,30 @@
+# Use official Python runtime as a parent image
 FROM python:3.10-slim
+
+# Set the working directory in the container
 WORKDIR /app
 
-RUN apt-get update && apt-get install -y libgl1 libglib2.0-0 ffmpeg && rm -rf /var/lib/apt/lists/*
+# 1. INSTALL SYSTEM DEPENDENCIES (Critical for Video Processing)
+# - ffmpeg: Required for stitching
+# - libgl1/libglib: Required for OpenCV and graphical operations
+RUN apt-get update && apt-get install -y \
+    ffmpeg \
+    libgl1-mesa-glx \
+    libglib2.0-0 \
+    && rm -rf /var/lib/apt/lists/*
 
+# 2. Install Python Dependencies (Cached)
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
+
+# 3. Copy Application Code
 COPY . .
+
+# 4. Create writable directory for outputs
 RUN mkdir -p outputs && chmod 777 outputs
+
+# 5. Expose Port
 EXPOSE 7860
-CMD ["uvicorn", "server:app", "--host", "0.0.0.0", "--port", "7860"]
+
+# 6. Start Server
+CMD ["python", "server.py"]