Docker. Symlink INSIDE context not working

Question

I've simplified setup for demonstration purposes, but I don't understand why this issue happens. What do I miss.

Project folder content

current -> releases/21
releases

inside releases/21 project with docker-compose.yml is located.

Here is the abridged version of my docker-compose.yml

version: '3'
services:
    app:
        container_name: app
        build:
            context: ../
            dockerfile: ./current/docker/app.docker

Of course, app.docker is there.

And still I receive this error

ERROR: Cannot locate specified Dockerfile: current/docker/app.docker

After running docker-compose up -d in the <project_folder>/current.

Answer 1

It works with an absolute path.

Something like this will work, but I still feel, that it's not a solution

version: '3'
services:
    app:
        container_name: app
        build:
            context: /var/www/<project-name>
            dockerfile: ./current/docker/app.docker