Chore: use PostgreSQL instead of SQLITE

app/config.py

@@ -13,7 +13,9 @@ class BaseConfig:
 
     # Database ===================================================
     SQLALCHEMY_TRACK_MODIFICATIONS = True
-    SQLALCHEMY_DATABASE_URI = os.environ.get("DB_OVERRIDE", "sqlite:///dev.db")
+    SQLALCHEMY_DATABASE_URI = os.environ.get(
+        "DB_OVERRIDE", "postgresql://user:pass@localhost/project_allocator_db"
+    )
 
 
 class DevConfig(BaseConfig):