refractor blogpost and cdn chall

services/cdn/flag_seed.py

@@ -0,0 +1,7 @@
+# Convenience: reseed flag once without starting server
+import hashlib, secrets, os
+FLAG_PATH = os.path.join(os.path.dirname(__file__), "flag.txt")
+sha = hashlib.sha256(secrets.token_bytes(32)).hexdigest()
+with open(FLAG_PATH, "w", encoding="utf-8") as fh:
+    fh.write(f"GEMASTIK{{{sha}}}\n")
+print("Flag reseeded:", open(FLAG_PATH).read().strip())