How to properly deploy an application with docker?

Question

PHP

Working with docker, I ran into a situation where I need to take a certain series of actions in order to deploy the project.
For example:
- build docker images (docker-compose build)
- install extensions (composer install)
- grant rights to certain log folders, etc.
In general, carry out a series of manipulations and finally launch the application. At first, I thought to write all these manipulations in containers so that everything is done during the build. But immediately stopped on "composer install". After a lot of googling, I came across mentions that this is not necessary.
I'm coming to the conclusion that I want to write scripts for this whole thing, but maybe I'm missing something or doing it wrong.
Tell me, please, where to dig?

Answer 1

- build the project
- install extensions
- build the image
then run it and keep the logs in volume, or send to the host or driver for logging to prescribe.
but there's a gap between building the image and running the image. and how the image will be run should not be specifically specified when building the image.

Answer 2

May I know what is the problem? Why are you "stopped"?
When you build, run composer installand that's it