1. To apply SSL on your Worksuite installation you will need properly working SSL certificate installed on your server
  2. In .env file set REDIRECT_HTTPS=true
  3. If you want to force it you will need to add suitable htaccess code to fit for your needs.
    You can try this one and should work good:
RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]