fix(ci): Add http test server image specifiers to CI (#6208)

- Adds `http_test_server_image` to inputs so that it gets set properly
for CI (`debug`) and CD (`perf`)
- Updates `dev` -> `debug` in docker-compose.yml to fix pulls
- Fixes issue with seeds and relevant docs from #6205

docs/CONTRIBUTING.md

@@ -89,7 +89,7 @@ You should now be able to connect to `http://localhost:8080/<account-uuid-here>`
 and sign in with the following credentials:
 
 ```text
-Email:    firezone@localhost
+Email:    firezone@localhost.local
 Password: Firezone1234
 ```