This module requires the Default Content for D8 module.
To update exported content, run:
drush dcer --folder=modules/custom/pidramble_default_content/content/ node 1
You can substitute any entity type for node (e.g. file, user, block_content), and when any entity is exported, referenced entities are also exported at the same time.
This module includes a few files which are copied into the Drupal installation inside pidramble_default_content_install(). These files are referenced by the file entities in content/file.
If updating the file entity itself (e.g. with a newer version of the default files), you should also update the file stored inside default_files.
If adding a new file, make sure you add it to the array of files to be copied inside pidramble_default_content_install().