I'm trying to start a Spring boot server to serve http2 instead of http1.1. The code is here. I thought having the settings in my application.properties is enough for the server to start serving traffic with http2 but when I start the server from Intellij on my Windows machine, the server starts fine without any warnings or errors. When I did a curl -k -sI https://localhost:8443/test, I'm still getting HTTP/1.1 in the header. Why is my local server not using http2?
Based on hitting my server from Chrome, it seems the server is indeed serving through h2. It is my curl that doesn't support http/2.