chore(design) Redo the webpage

Trying to make a modern webpage. Tailwind is verbose but helps to do it
faster. I will later make a better CSS.

TODO: make dynamic links to package repository, exe, binaries... and add
a better example

override.yaml

@@ -5,3 +5,5 @@ server:
     host: www.katenary.io
     annotations:
       cert-manager.io/cluster-issuer: letsencrypt-prod
+      nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
+      nginx.ingress.kubernetes.io/from-to-www-redirect: "true"