[DOCKER] When [command not found: composer] is displayed when [composer install] is displayed in Laravel

Error handling method when composer install

【State】 Laravel is built with docker and the container is started with the following command

docker-compose up -d --build

~ Supplementary explanation ~

-d → Detached mode: Running the container in the background.

--build → It reloads the Dockerfile and reflects the updated information.

【problem】 Since the container has started up, when I access [http: // localhost /](http: // localhost /), the following error message is displayed! image.png

[Cause] composer couldn't be installed ...


  1. Move to the directory containing Laravel

(Change the directory with cd and move to the folder containing app and bootstrap)

  1. Perform the installation
composer install


composer update

You can do it with.

[Impression] Recently, I feel that my ability to investigate is growing ...

There is no shame in not knowing; the shame lies in not finding out

It's not a shame not to know. It's a shame not to know

Tell me,

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