FROM Ubuntu # 1.Layer – Base Ubuntu Layer

RUN apt-get update && apt-get upgrade -y # 2.Layer – Changes in apt packages

RUN pip install flask flask-mysql # 3. Layer – Changes in pip packages
 
COPY . /opt/source-code # 4.Layer – Source Code

ENTRYPOINT FLASK_APP=/opt/source-code/app.py flask run # 5.Layer – Update Entrypoint