workspace apt command

* add mail service

Closes #1751

* Change base image

GMP

workspace npm bower

* Add .gitignore
* Change file to example.

* fix application path

In the "env.sample" , "APP_CODE_PATH_HOST"  was written. I fixed Documentation.

* fix node PATH to enable docker-compose exec workspace npm
* add PATH for yarn to enable docker-compose exec workspace yarn

* add live reload and basicauth

Add Web Based IDEs: Theia, WebIDE, Codaid, IceCoder.

This developer needed to turn back the clock in the PHP-FPM container, you will not believe what he did next! (#1675)

* Added documentation for installing libfaketime in the php-fpm container
* Enabled installing and using libfaketime system-wide inside the php-fpm container

* Include metabase service
* Removing unecessary environment variables
* Update documentation

#1707 

* php-fpm and workspace arg var rename: PHP_VERSION to  LARADOCK_PHP_VERSION.
* travis-ci skip phpbdg

* -u no longer supported

https://varnish-cache.org/docs/4.1/reference/varnishd.html
https://support.jpgottech.com/knowledgebase.php?article=90
issue #1732 

Remove version lock from pecl install
Update to Debian 9 repos since our image is Debian 9
Remove duplicate locales-gen line
Closes #1622

* Fix guide links
* Changed absolute link to relative

* implemented option to add bcmath to laradock php-worker
* updated docs

* Add gitlab

Docker file changes for image size improvements.

Otherwise it doesn't work

* Added option to install the php calendar extension in php-fpm
* Added section about installing php calendar extension in php-fpm