feat: service dependencies

Issue #6

src/service/exceptions.py

@@ -4,4 +4,16 @@ Module specific exceptions for <this module>
 Exceptions:
  - List: Description
  - Exceptions: Description
-"""
+"""
+from typing import Optional
+
+from fastapi import HTTPException, status
+
+
+class ServiceNotFoundException(HTTPException):
+	def __init__(self, service_id: Optional[int] = None) -> None:
+		detail = "Service not found" if service_id is None else f"Service with ID '{service_id}' was not found."
+		super().__init__(
+			status_code=status.HTTP_404_NOT_FOUND,
+			detail=detail,
+		)