use sqlite instead of SQL

apps/backend/app/main.py

@@ -1,8 +1,10 @@
 from fastapi import FastAPI
 
+from app.database import engine, Base
+from app import models
 from app.routers import projects, experiences, skills
 
-models.Base.metadata.create_all(bind=engine)
+Base.metadata.create_all(bind=engine)
 
 app = FastAPI()