Exceptions in .dockerignore

Question

How does .dockerignore handle exceptions?

For example, I would like to ignore everything from the src/ directory except for src/web/p

Answer 1

Using my response to another question https://stackoverflow.com/a/51429852/2419069 you can use the following .dockerignore file:

# Ignore everything
**

# Allow /src/web/public directory
!/src/web/public/**

# You can also ignore unnecessary files inside the /src/web/public to make your image even smaller.
**/*~
**/*.log
**/.DS_Store
**/Thumbs.db