Add Dokerfile and Requirements fulfilled

.python-version

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+3.11.8

Dockerfile

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+FROM ubuntu:24.04
+
+RUN useradd meto && apt-get update && apt-get install -y python3 python3-pip
+
+WORKDIR /app
+COPY --chown=meto requirements.txt .
+RUN pip install --break-system-packages -r requirements.txt    
+
+COPY --chown=meto app/  /app
+
+USER meto
+
+CMD [ "python3", "app.py" ] 

app/app.py

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+import os
+
+from flask import Flask
+
+app = Flask(__name__)
+
+
+@app.route("/")
+def hello_world():
+    return "Hello, World!"
+
+
+if __name__ == "__main__":
+    app.run(port=os.environ.get("PORT", 3000), host="0.0.0.0")

requirements.txt

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+blinker==1.6.3 ; python_version >= "3.10" and python_version < "4.0"
+click==8.1.7 ; python_version >= "3.10" and python_version < "4.0"
+colorama==0.4.6 ; python_version >= "3.10" and python_version < "4.0" and platform_system == "Windows"
+flask==3.0.0 ; python_version >= "3.10" and python_version < "4.0"
+itsdangerous==2.1.2 ; python_version >= "3.10" and python_version < "4.0"
+jinja2==3.1.2 ; python_version >= "3.10" and python_version < "4.0"
+markupsafe==2.1.3 ; python_version >= "3.10" and python_version < "4.0"
+werkzeug==3.0.0 ; python_version >= "3.10" and python_version < "4.0"
+