🚀 Fix: Port 7860 and absolute DB path for HF Spaces

backend/Dockerfile

@@ -34,8 +34,8 @@ USER user
 
 # Health check
 HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
-    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8000/api/health').read()" || exit 1
+    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:7860/api/health').read()" || exit 1
 
-EXPOSE 8000
+EXPOSE 7860
 
-CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]

backend/app/database.py

@@ -3,7 +3,10 @@ from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker
 from app.config import settings
 
-SQLALCHEMY_DATABASE_URL = settings.database_url or "sqlite:///./andesops.db"
+import os
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+default_db_path = f"sqlite:///{os.path.join(BASE_DIR, 'andesops.db')}"
+SQLALCHEMY_DATABASE_URL = settings.database_url or default_db_path
 
 # SQLite specific config for FastAPI multi-threading
 connect_args = {"check_same_thread": False} if SQLALCHEMY_DATABASE_URL.startswith("sqlite") else {}