Add Dockerfile for Python application setup

Dockerfile

@@ -0,0 +1,24 @@
+FROM python:3.10-slim
+
+WORKDIR /app
+
+# System dependencies
+RUN apt-get update && apt-get install -y \
+    gcc \
+    g++ \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Download NLTK data
+COPY setup_nltk.py .
+RUN python setup_nltk.py
+
+# Copy all project files
+COPY . .
+
+EXPOSE 7860
+
+CMD ["python", "app.py"]