Fixed test_webui only failing in nix_sandbox

pkgs/clan-cli/README.md

@@ -69,8 +69,22 @@ You can also run a single test like this:
 pytest -n0 -s tests/test_secrets_cli.py::test_users
 ```
 
+## Run tests in nix container
+
+Run all impure checks
+
+```console
+nix run .#impure-checks
+```
+
+Run all checks
+
+```console
+nix flake check
+```
+
 ## Debugging functions
 
 Debugging functions can be found under `src/debug.py`
-quite interesting is the function repro_env_break() which drops you into a shell
+quite interesting is the function breakpoint_shell() which drops you into a shell
 with the test environment loaded.