I heard that SECARMY is providing exiting prizes for winners, did you checked that out?
Author: TheIllusion
Flag hidden in the source code of https://ctf.sec.army/prizes, embedded base64 encoded string as comment near the bottom.
$ echo "c2VjYXJteXtzMHVyYzNfaTVfbjNjZXM1YXJ5fQo=" | base64 -d
flag: secarmy{s0urc3_i5_n3ces5ary}