Create Dockerfile

Dockerfile

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+FROM python:3.9-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+ENV FLASK_APP=wsgi.py
+ENV FLASK_ENV=production
+
+EXPOSE 8080
+
+CMD ["gunicorn", "--bind", "0.0.0.0:8080", "wsgi:app"]