created dockerfile

Dockerfile

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+# Use Python 3.9
+FROM python:3.9
+
+# Set working directory
+WORKDIR /code
+
+# Copy requirements and install
+COPY ./requirements.txt /code/requirements.txt
+RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
+
+# Copy the app
+COPY . .
+
+# Create a non-root user (required by HF Spaces)
+RUN useradd -m -u 1000 user
+USER user
+ENV HOME=/home/user \
+    PATH=/home/user/.local/bin:$PATH
+
+# Run the app on port 7860
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]