fix(api): add node-forge as explicit dependency

webpack-dev-server 5.2.4 swapped selfsigned@^2.4.1 for selfsigned@^5.5.0,
which no longer depends on node-forge. apps/api was implicitly using it as
a transitive dep.

Signed-off-by: Toma Puljak <toma.puljak@hotmail.com>