📝 Add note about path declaration order

docs/tutorial/path-params.md

@@ -98,6 +98,24 @@ You can use the same type declarations with `str`, `float`, `bool` and many othe
 
 These are explored in the next chapters of the tutorial.
 
+
+## Order matters
+
+When creating *path operations*, you can find situations where you have a fixed path.
+
+Like `/users/me`, let's say that it's to get data about the current user.
+
+And then you can also have a path `/users/{user_id}` to get data about a specific user by some user ID.
+
+Because path operations are evaluated in order, you need to make sure that the path for `/users/me` is declared before the one for `/users/{user_id}`:
+
+```Python hl_lines="6 11"
+{!./src/path_params/tutorial003.py!}
+```
+
+Otherwise, the path for `/users/{user_id}` would match also for `/users/me`, "thinking" that it's receiving a parameter `user_id` with a value of `"me"`.
+
+
 ## Recap
 
 With **FastAPI**, by using short, intuitive and standard Python type declarations, you get: