fix: usage 0.0.0.0 instead of localhost by default in .env.example

[theoludwig]

By default, when creating an Adonis app, we can't access the running application using 127.0.0.1 which is unexpected.
While someone can easily find out, it is because the .env is misconfigured, and should set HOST=0.0.0.0 it can still be quite cumbersome to understand and find out why it is not working.

This PR, change the default provided in .env.example.
If you accept this PR, I will be able to open similar PRs for the other starter kits: https://github.com/adonisjs/web-starter-kit and https://github.com/adonisjs/slim-starter-kit

[RomainLanz]

By default, when creating an Adonis app, we can't access the running application using 127.0.0.1

We can access it through 127.0.0.1 or localhost.

0.0.0.0 means it should listen on all interfaces. It is useful for specific use cases, like those inside a Docker container or when you are trying to access your application from another device inside your network.

[theoludwig]

I verified again to be sure 100%, with HOST=localhost:

With HOST=0.0.0.0:

0.0.0.0 means it should listen on all interfaces. It is useful for specific use cases, like those inside a Docker container or when you are trying to access your application from another device inside your network.

Yes, it is useful in many cases, so why not use it by default?
Are there any drawback of doing so, other than now, the application is accessible on the whole network, with the local ip address like for example: 192.168.1.56:3333.

You are also using HOST=0.0.0.0 for https://github.com/adonisjs/adonisjs.com/blob/main/.env.example.

[theoludwig]

Should this PR be closed as unlikely to be merged? @RomainLanz