Laravel Example (#1112)

## Summary

Example of using Devbox to create a Laravel development stack. Special
thanks to @jrseliga for helping me develop and test this example!!

## How was it tested?
Test steps in order:
* `devbox run create-project` -- should create the Laravel project
* `devbox services up` -- should start mysql + php-fpm
* `devbox run db:create` -- should create the `laravel` db
* `devbox run db:migrate` -- should successfully run the default Laravel
migrations.
* `devbox run serve:dev` -- should start the artisan server, opening the
URL should load the Laravel hello world page

Author: Lagoja

examples/stacks/laravel/devbox.d/php/php-fpm.conf

@@ -0,0 +1,16 @@
+[global]
+pid = ${PHPFPM_PID_FILE}
+error_log = ${PHPFPM_ERROR_LOG_FILE}
+
+[www]
+; user = www-data
+; group = www-data
+listen = 0.0.0.0:${PHPFPM_PORT}
+; listen.owner = www-data
+; listen.group = www-data
+pm = dynamic
+pm.max_children = 5
+pm.start_servers = 2
+pm.min_spare_servers = 1
+pm.max_spare_servers = 3
+chdir = /

examples/stacks/laravel/devbox.d/php/php.ini

@@ -0,0 +1,6 @@
+[php]
+
+; Put your php.ini directives here. For the latest default php.ini file, see https://github.com/php/php-src/blob/master/php.ini-production
+
+; memory_limit = 128M
+; expose_php = Off