For very selective builds, a robust strategy is to ignore everything by default (*) and then use the negation pattern (!) to explicitly include only the necessary files or directories.
Example:
# Ignore everything
*
# Include only what's needed
!src/
!package.json
!package-lock.json
Seems it has not been updated for 8 years:
https://github.com/apache/cloudstack/blob/main/.dockerignore
For very selective builds, a robust strategy is to ignore everything by default (*) and then use the negation pattern (!) to explicitly include only the necessary files or directories.
Example:
Seems it has not been updated for 8 years:
https://github.com/apache/cloudstack/blob/main/.dockerignore