Fix Dockerfile: Add git for HF Spaces development features

HF Spaces injects git config commands for development environment.
Added git to system dependencies to fix build error.

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Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -4,11 +4,12 @@ FROM python:3.10-slim
 # Set working directory
 WORKDIR /app
 
-# Install system dependencies
+# Install system dependencies (including git and wget for HF Spaces)
 RUN apt-get update && apt-get install -y \
     build-essential \
     curl \
     wget \
+    git \
     && rm -rf /var/lib/apt/lists/*
 
 # Copy requirements file