ci: generate auth secret in production (#1681)

* ci: generate auth secret in production

* refactor: remove no longer needed auth-secret from e2e test

* fix: remove static auth secret

e2e/shared/create-homarr-container.ts

@@ -6,9 +6,6 @@ export const createHomarrContainer = () => {
   }
 
   return new GenericContainer("homarr-e2e")
-    .withEnvironment({
-      AUTH_SECRET: "secret",
-    })
     .withExposedPorts(7575)
     .withWaitStrategy(Wait.forHttp("/api/health/ready", 7575));
 };