Rename dockerfile to Dockerfile for Hugging Face compatibility

Dockerfile

@@ -0,0 +1,26 @@
+FROM python:3.10-slim
+
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements first for better caching
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application files
+COPY app.py .
+COPY .env .
+
+# Initialize api_keys.json if it doesn't exist
+RUN if [ ! -f api_keys.json ]; then echo "{}" > api_keys.json; fi
+RUN chmod 666 api_keys.json
+
+# Standard Hugging Face Space port
+EXPOSE 7860
+
+# Run the Flask app
+CMD ["python", "app.py"]