Folder created in one step of DockerFile is not available in later steps


This Content is from Stack Overflow. Question asked by Daryl Aranha

I am trying to dockerize a flask application but before I spin up the server I need to make sure some of the files are available. These files are stored in Google Cloud Storage. A script is written that will fetch the data from GCP and store it in a folder. The final step is to run but the created folder is not present during this step. Can anyone tell me what I am missing?

Here is my DockerFile

FROM python:3.8-slim-buster

WORKDIR /backend

# All python packages needed for this project are put in this file
COPY requirements.txt requirements.txt

RUN pip3 install -r requirements.txt

COPY . .

# This script currently connects to GCP cloud storage
# fetch the required file
# create a folder and store the fetched file in that folder
RUN python3

CMD ["python3", "-m", "flask", "run", "--host="]


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