Thinking about it, probably the most sensible solution would be to release a new major version (1.0.0) with support for a completely composer based installation.

I will try working on a PR.

I'm having some trouble with the wget https://getcomposer.org/composer.phar command which downloads the latest version of composer (v2) by default and give me an error when running Running composer update.
I have to modify my Envoy.blade.php files:

    php composer.phar install --no-interaction --no-dev --prefer-dist --ignore-platform-reqs
    php composer.phar self-update --1
    php ./vendor/bin/october install

        php composer.phar self-update --1

I'm having some trouble with the wget https://getcomposer.org/composer.phar command which downloads the latest version of composer (v2) by default and give me an error when running Running composer update.

You can use this instead:

[ ! -f composer.phar ] && (curl -sS https://getcomposer.org/installer | php)

This change is available as 0.9.3:

50a88a3

@tobias-kuendig ,

When using (curl -sS https://getcomposer.org/installer | php) :

[user@server]$ (curl -sS https://getcomposer.org/installer | php)
All settings correct for using Composer
Downloading...

Composer (version 2.0.11) successfully installed

Still installing v2 as it is the stable channel.
I have to trick a little your line:

[ ! -f composer.phar ] && (curl -sS https://getcomposer.org/installer | php -- --1)

Result :

[user@server]$ (curl -sS https://getcomposer.org/installer | php -- --1)
All settings correct for using Composer
Downloading...

Composer (version 1.10.20) successfully installed

Looks like they did change the installer script to use version 2 by default. Thanks for the heads up @damsfx, I did fix the template file.