Hey there,
After reviewing your project description its clear that you need 3 task done on your Google Cloud VPS. 1st of all you need to fix a bad redirection that is redirecting your Domain to IP on your browser URL bar, Secondly you want to remove the Bitnami info banner from the server and 3rd and last you want to change the max input, input time, execution time on php and memory limit on php.
I'm very experienced with Linux Administration, Apache, PHP, DNS.
I'll be happy to complete this project for you.
Thanks in advance for giving the opportunity to working with you.
Have a good day.
Best Regards,
Serazum Munir.