LinuxQuestions.org - Docker compose

Hello,
I have some questions about the docker compose:

1- In an internet article, a file called docker-compose.yaml was created to build the container. Can I create a YAML file for each container and use docker compose up -d to run it? If this is possible, how can I specify the input file?

2- I want to start a website that uses Nginx web server and PHP and JavaScript programming languages. Do I need a container for each (Nginx, PHP and JavaScript)?

3- The following configuration file creates a container using image and connects the containers using links:

Code:

version: '3.9'

services:

  web:

    image: nginx:latest

    ports:

      - '80:80'

    volumes:

      - ./src:/var/www/html/index.html

    links:

      - php-fpm

  php-fpm:

    image: php:8-fpm

Right?

4- I have created a container and now I want to make some changes in the YAML file and apply these new changes to the container. What should I do?

5- Is there a special folder for making containers? For example, the /var/www directory is for the web server.

Thank you.