feat(app): Initialize flask app

Dockerfile

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+FROM python:3.11-slim
+
+WORKDIR /app
+
+COPY . .
+
+RUN pip install --no-cache-dir -r dependencies.txt
+
+ENV FLASK_ENV=production
+ENV PYTHONUNBUFFERED=1
+
+CMD ["gunicorn", "app:app", "-b", "0.0.0.0:80", "--workers", "1"]