try to run

Dockerfile

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+FROM python:3.12.2
+
+WORKDIR /code
+
+COPY ./requirements.txt /code/requirements.txt
+
+RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
+
+COPY . .
+
+CMD ["gunicorn","-b", "0.0.0.0:7860", "main:app"]

requirements.txt

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+Flask
+gunicorn
+line-bot-sdk
+markdown
+beautifulsoup4