I'm running the Jupyter Notebook service on an EC2 and am trying to add it to a target group in AWS. However, health checks are failing. I saw this GitHub issue and used the /api endpoint to no avail. If I go on the EC2, I see the jupyter-notebook running on port 8888, and am able to do this in the EC2. $ curl -v localhost:8888/api * Host localhost:8888 was resolved. * IPv6: ::1 * IPv4: 127.0.0.1 * Trying [::1]:8888... * connect to ::1 port 8888 from ::1 port 50380 failed: Connection refused * Trying 127.0.0.1:8888... * Connected to localhost (127.0.0.1) port 8888 > GET /api HTTP/1.1 > Host: localhost:8888 > User-Agent: curl/8.5.0 > Accept: */* > < HTTP/1.1 200 OK < Server: TornadoServer/6.4.1 < Content-Type: application/json < Date: Fri, 18 Apr 2025 19:09:47 GMT < X-Content-Type-Options: nosniff < Content-Security-Policy: frame-ancestors 'self'; report-uri /api/security/csp-report; default-src 'none' < Etag: "6c31fb62a67a5b2884dbd208b806589cc45521a5" < Content-Length: 21 < * Connection #0 to host localhost left intact Any clues? Continue reading...