"Missing PHP version tag in Docker compose file, causing error"

Question

I'm taking a microservices course and I downloaded the project from the course website, but the project doesn't work.

I have a PHP Lumen project, here is its docker-compose.yml file, I updated its composer dependency before running it because my computer only has PHP 8.1:

version: '3.7'
services:
    web-academico:
        build: ./php-web
        volumes:
          - ./php-web/:/app
          - type: bind
            source: ./php-web.sh
            target: /app/entrypoint.sh
        working_dir: /app
        command: sh ./entrypoint.sh
        ports:
          - 8080:8080

When I run this docker-compose, I get the following error message:

Fatal error: Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 8.1.0". You are running 8.0.21 . in /app/vendor/composer/platform_check.php on line 24

I tried setting the TAG to "image: php:8.1.0-fpm", but it didn't work.

entrypoint.sh is blank.

How do I resolve this issue? Why does Docker run when there is no TAG image in docker-compose.yml?

Answer 1

I forgot the Dockerfile, the configuration information is all in that file.