What Type of Web Server should I use to deploy VueJS + NodeJS website and How?

I recently started to create Website using (Nuxt Framework) Vuejs(Front End) and Nodejs(Back End; right now I am using MongoDB but Wondering if I should use MariaDB) for my company. I have a skeleton of the website so I have been trying to practice to deploy the website.

The Company already have DNS and have Name Server to add websites. All of the company's websites are in PHP+HTML so nothing I can refer to [nor anyone to help me :( ].

My questions are:

1. Is it possible to connect my website through IIS? (FYI- the company have cloud server with IIS connecting to named-server). Some talked about using NGINX?
2. I have seen abundance of deploying to Firebase or Netify Hosting. Do I just npm run build and connect through IIS?
3. Do I need to create separate server for front and back end? or is it possible to run the NodeJS in localhost and connect to frontend Server?

I know I am trying to cover a lot of information but I have been working this project on and off for 5 months but I just need to know if it possible to get it running!