docs: create GEMASTIK 2026 Warmup writeups (ch1-14) via MCP DB API

- Deleted all 14 dummy docs from DB + filesystem
- Created 14 Gemastik warmup writeups + index via create_document API (DB-first)
- ch1-ch12: encoding/stego/web/pwn basics
- ch13: RSA small factors
- ch14: RSA special integers via paper-search (GCD with paper appendix primes)
- All 15 docs indexed and live at wiki.asepharyana.my.id

content/writeups/gemastik-2026-warmup/ch5-nothing-here.md

@@ -1,13 +1,20 @@
 ---
 title: "Nothing Here — Web Comment"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "web"]
+path: "writeups/gemastik-2026-warmup/ch5-nothing-here.md"
+created_at: "2026-08-21T07:25:28.880Z"
+updated_at: "2026-08-21T07:25:28.880Z"
 event: "GEMASTIK 2026 Warmup"
-challenge: "Nothing Here"
+challenge: "Nothing Here — Web Comment"
 category: "web"
 points: 500
 difficulty: "easy"
 flag: "GEMASTIK19{v13w_s0urc3_pahlawan}"
 ---
-
 # Nothing Here (500 pts) — Web
 
 **URL:** `http://15.232.89.109:8001/`
@@ -26,4 +33,4 @@ curl -s http://15.232.89.109:8001/ | grep -i 'GEMASTIK\|<!--'
 
 ## Flag
 
-`GEMASTIK19{v13w_s0urc3_pahlawan}`
+`GEMASTIK19{v13w_s0urc3_pahlawan}`