s6-overlay improvements

[alexjustesen]

This PR includes a range of changes to how s6-overlay runs and manages processes during startup and during the lifecycle of the container in the hopes of addressing the following issues:

• Configuration - Could not retrieve or read configuration (ConfigurationError) - Back again. #389
• In Terminal.php line 131: exec(): Unable to fork [stty 2>&1] #400

Changelog

Added

• cache views to improve UI performance
• pgsql database to local docker-compose.yml file for testing

Changed

• improved startup logging so that tasks are dependent on one another instead of "racing" to the finish by forcing laravel-automations to only run after configure-ssl
• inline creation of crontab task in the Dockerfile
• overwrite runas-user and laravel-automations scripts instead of appending to them to improve start-up performance
• use dependencies.d to describe a processes dependencies during startup.