boot.img
extracted from factory ROM and then flash with TWRP.(Tested and it works.)
Useful resources:
Install Syncthing.
Creast this file under the photos directory that is to be synced:
# filename: .stglobalignore Add details
Include the above file in the actual .stignore
file to filter files:
# include .stglobalignore
Note: syncthing's ignore syntax is different from git's.