Docker-compose volumes sharing issue with /app folder

Question

I'm trying to build a web application based on flask and vue.js, using docker containers. I use volume sharing in docker-compose and I'm facing an issue with the container structure. I'd like to share the application folder from the host with the /app container folder. To do so the docker-compose is set up as

volumes:
 - type: bind
   source: ./
   target: /app

inspecting the container shows that the data from the host is placed inside the folder /app/app and not inside the folder /app as expected. The working directory is set up inside the docker container:

FROM continuumio/miniconda3:latest
WORKDIR /app

COPY dependency.yml .
RUN conda env create -f dependency.yml
COPY setup.py .
RUN pip install -e .

In an attempt to try to understand the relative/absolute path I tried to change the target volume to /data in the docker-compose file. In this case the application files are installed in the /app and the host files are copied in the /data folder, as expected.

The question is: why if I try to use the absolute /app folder in the container does the system use it as relative to the WORKDIR, and this happens only if the WORKDIR has the same name as the target folder?

Answer 1

等待大神答复