Sooo, that doesn’t give me the nginx welcome page at all.
Can you try it on another device like your phone?
curl -I example.com -L
HTTP/1.1 301 Moved Permanently
Server: nginx/1.18.0
Date: Mon, 25 Jan 2021 20:35:21 GMT
Content-Type: text/html
Content-Length: 169
Connection: keep-alive
Location: https://example.com/
HTTP/2 200
server: nginx
date: Mon, 25 Jan 2021 20:35:22 GMT
content-type: text/html; charset=utf-8
vary: Accept-Encoding
x-frame-options: SAMEORIGIN
x-xss-protection: 1; mode=block
x-content-type-options: nosniff
x-download-options: noopen
x-permitted-cross-domain-policies: none
referrer-policy: strict-origin-when-cross-origin
x-discourse-route: finish_installation/index
cache-control: no-cache, no-store
content-security-policy: base-uri 'none'; object-src 'none'; script-src https://example.com/logs/ https://example.com/sidekiq/ https://example.com/mini-profiler-resources/ https://example.com/assets/ https://example.com/brotli_asset/ https://example.com/extra-locales/ https://example.com/highlight-js/ https://example.com/javascripts/ https://example.com/plugins/ https://example.com/theme-javascripts/ https://example.com/svg-sprite/; worker-src 'self' https://example.com/assets/ https://example.com/brotli_asset/ https://example.com/javascripts/ https://example.com/plugins/
x-request-id: 8755d4fa-387f-4509-8709-b6075f274d09
x-runtime: 0.026020
strict-transport-security: max-age=31536000