Packer
Provisioners
Provisioners use built-in and third-party software to install and configure the machine image after booting. Provisioners prepare the system, so you may want to use them for the following use cases:
- installing packages
 - patching the kernel
 - creating users
 - downloading application code
 
Refer to the provisioner block documentation to learn more
about working with provisioners. The documentation includes details about each type of provisioner.