.htaccess react-router force https

<ifModule mod_rewrite.c>


  #######################################################################
  # GENERAL                                                             #
  #######################################################################

  # Make apache follow sym links to files
  Options +FollowSymLinks
  # If somebody opens a folder, hide all files from the resulting folder list
  IndexIgnore */*


  #######################################################################
  # REWRITING                                                           #
  #######################################################################

  # Enable rewriting
  RewriteEngine On

  # If its not HTTPS
  RewriteCond %{HTTPS} off

  # Comment out the RewriteCond above, and uncomment the RewriteCond below if you're using a load balancer (e.g. CloudFlare) for SSL
  # RewriteCond %{HTTP:X-Forwarded-Proto} !https

  # Redirect to the same URL with https://, ignoring all further rules if this one is in effect
  RewriteRule ^(.*) https://%{HTTP_HOST}/$1 [R,L]

  # If we get to here, it means we are on https://

  # If the file with the specified name in the browser doesn't exist
  RewriteCond %{REQUEST_FILENAME} !-f

  # and the directory with the specified name in the browser doesn't exist
  RewriteCond %{REQUEST_FILENAME} !-d

  # and we are not opening the root already (otherwise we get a redirect loop)
  RewriteCond %{REQUEST_FILENAME} !\/$

  # Rewrite all requests to the root
  RewriteRule ^(.*) /

</ifModule>

nginx.conf

server {
    listen 80;

    location / {
        root /usr/share/nginx/html;
        index index.html index.htm;
        try_files $uri $uri/ /index.html =404;
    }

    include /etc/nginx/extra-conf.d/*.conf;
}