Update Dockerfile-71

fix #1041

php7.1-xdebug instead of php-xdebug instead.
apt-get update needed therefore

Possible fix described on: https://bugs.mysql.com/bug.php?id=85946

```
[mysqld]
character-set-server=utf8
```

add APACHE_SITES_PATH variable

ElasticSearch instance fails at loading (missing parameters)

Fix pgadmin can't boot

 fixed issue #1017, added ENV variables back to Dockerfile and added …

fix caddy service build failed

Fix travis ci build failing

[Fix] Mailhog should be exposed to backend

nginx sites-available shoule only use *.conf

- fixes failing connection to host "mailhog" when sending mail via smtp
- mailhog needs to be available for the backend at Port 1025
- i.e. in a Laravel app .env should contain "MAIL_HOST=mailhog 

although most much of use case developer should modify laradock to suit their project. we can use *.conf.example to take effect.
but we also need a dummy nginx conf to info other newer to know how to config their nginx conf. the *.conf.example should be.

so i think we should only take *.conf to take effect. not *

ElasticSearch (ES from now onwards) will fail to initialize since the parameters for its environment are not correct or absent. These are:

* `cluster.name`: Name of the cluster itself
* `bootstrap.memory_lock`: Needed for ES to [lock the JVM into swap instead of memory](https://www.elastic.co/guide/en/elasticsearch/reference/master/_memory_lock_check.html).
* `"ES_JAVA_OPTS=-Xms256m -Xmx256m"`: [Initial and maximum HEAP size for JVM](https://www.elastic.co/guide/en/elasticsearch/reference/current/_heap_size_check.html). Since it's locked to disk, should be the same. Half the defaults (512m) for development.
* `ulimits: memlock: soft (-1), hard (-1)`: [ES needs to have unlimited access to memory](https://www.elastic.co/guide/en/elasticsearch/reference/current/max-size-virtual-memory-check.html), otherwise it will feel sluggish.  
* `mem_limit: 512m`: Hard limit the memory available for the container.

This can, and should, be changed using `.env` file variables, but it seems that this should suffice for basic ES development.

Set Timezone

Set default setting to false for various Workspace installation options

Added TZ environment for MySQL Container

ElasticSearch - Change to official repository

Kibana - Change to official repository

Elastic.co announced they will pull out their official images from the Docker Registry and user their own. There will be no updates starting 6/20/2017.

Pulling needs explicit version. Currently 5.4.1

Elastic.co announced they will pull out their official images from the Docker Registry and user their own. There will be no updates starting 6/20/2017.

Pulling needs explicit version. Currently 5.4.1

- Laravel Envoy
- Laravel Installer
- LinuxBrew
- MS SQL Server

Merge master

Merge master 

git key  to pull code