Fix NFO service 503 error

- Load TMDB API key and NFO settings from config.json
- Sync NFO config to settings during app startup
- NFO endpoints now work correctly (no more 503)

docs/instructions.md

@@ -39,7 +39,16 @@ If you encounter:
 
 ---
 
-## 📚 Helpful Commands
+## <EFBFBD> Credentials
+
+**Admin Login:**
+
+- Username: `admin`
+- Password: `Hallo123!`
+
+---
+
+## <20>📚 Helpful Commands
 
 ```bash
 # Run all tests
@@ -114,6 +123,21 @@ All tasks completed! The NFO database query issue has been resolved.
 
 ## Recently Fixed Issues:
 
+### ✅ Fixed: NFO Service 503 Error (2026-01-18)
+
+**Issue:** Failed to load resource: the server responded with a status of 503 (Service Unavailable) when creating NFO files.
+
+**Root Cause:** The TMDB API key configured in `data/config.json` was not being loaded into the application settings during startup. The NFO service dependency check was failing because `settings.tmdb_api_key` was None.
+
+**Solution:** Updated `fastapi_app.py` startup code to sync NFO configuration (including TMDB API key) from `data/config.json` to `settings` object, similar to how `anime_directory` was already being synced.
+
+**Files Modified:**
+- [src/server/fastapi_app.py](../src/server/fastapi_app.py)
+
+**Verification:** NFO endpoints now return 200 OK instead of 503, and NFO creation is functional.
+
+---
+
 ### ✅ Fixed: NFO Database Query Error (2026-01-18)
 
 **Issue:** WARNING: Could not fetch NFO data from database: '\_AsyncGeneratorContextManager' object has no attribute 'query'