fix/docs: cache config and fix swagger link

README.md

@@ -82,9 +82,9 @@ You can install the required dependencies for your editor with the following.
 poetry install
 ```
 
-You can spin the server up locally with the following. You can access the Swagger UI at [localhost:7860/api/docs](http://localhost:7860/api/docs).
+You can spin the server up locally with the following. You can access the Swagger UI at [localhost:7860/schema/swagger](http://localhost:7860/schema/swagger).
 
 ```bash
 docker build -f Dockerfile.build -t capgen .
-docker run --rm -e APP_PORT=7860 -p 7860:7860 capgen
+docker run --rm -e SERVER_PORT=7860 -p 7860:7860 capgen
 ```

server/config.py

@@ -1,10 +1,29 @@
-from typing import TypeVar
+from functools import lru_cache
+from typing import Callable, TypeVar
 
 from pydantic_settings import BaseSettings
 
 T = TypeVar('T')
 
 
+def cache(user_function: Callable[[type[T]], T]) -> Callable[[type[T]], T]:
+    """
+    Summary
+    -------
+    a specific decorator to cache the result of a function
+
+    Parameters
+    ----------
+    user_function (Callable[[type[T]], T]) : the function to cache
+
+    Returns
+    -------
+    wrapper (Callable[[type[T]], T]) : the wrapper function
+    """
+    return lru_cache(maxsize=None)(user_function)
+
+
+@cache
 def singleton(cls: type[T]) -> T:
     """
     Summary