How does COPY work in DOCKERFILE?

Question

Docker

Good afternoon. I have a dockerker project file located in the project's env folder. How to copy the file from the project root to this directory.
This is how the command is written COPY ~/.env.dist /env/
Here is the error: Service 'app' failed to build: COPY failed: stat /var/lib/docker/tmp/docker-builder456578354/~/.env.dist: no such file or directory.
Why is he looking for him there? and what command should be for him to take the file from the root of the project

Answer 1

COPY readme.txt /usr/src/test
readme.txt - file in current folder along with Dockerfile

Answer 2

Thanks I got it