Refactor Nginx configuration and update project dependencies

- Cleaned up the Nginx configuration for the Coolify deployment, ensuring proper formatting and organization.
- Updated the `pyproject.toml` file to maintain consistent formatting.
- Reformatted the `requirements.txt` file for better readability while keeping the dependencies unchanged.

backend/app/models/users.py

@@ -1,17 +1,17 @@
-"""Pydantic schemas for user management endpoints."""
-from pydantic import BaseModel, EmailStr
-
-
-class UserResponse(BaseModel):
-    id: str
-    email: str
-    role: str
-
-
-class UpdateUserRequest(BaseModel):
-    email: EmailStr | None = None
-    password: str | None = None
-
-
-class SetRoleRequest(BaseModel):
-    role: str
+"""Pydantic schemas for user management endpoints."""
+from pydantic import BaseModel, EmailStr
+
+
+class UserResponse(BaseModel):
+    id: str
+    email: str
+    role: str
+
+
+class UpdateUserRequest(BaseModel):
+    email: EmailStr | None = None
+    password: str | None = None
+
+
+class SetRoleRequest(BaseModel):
+    role: str