[WIP] Support for cloud version (#17)

* Added build-cloud to Makefile

* Fix env var key GOOS

* Added taskSetReleaseVersion for edgeboxctl version option write into DB

* taskGetSystemUptime to run every 5 ticks

* Added support for detecting main disk in cloud version

* Added missing import

* Finding main device in test

* Refactored GetDevices and test to use release_version

* Added utils.getIP function, set to run as a 60 tick scheduled task

* Added taskEnablePublicDashboard and taskDisablePublicDashboard

* Added utils.WriteOption and refactor, added enablePublicDashb0oard

* Finalizing online support for dashboard, cloud version support

* Added task SetupCloudOptions

* Added couple of func description comments

* Early return statement (thanks @inverse)

* Using IsPublicDashboard in DisablePublicDashboard func

* Added constants for release version and device types, added diagnostics.GetReleaseVersion

* Removed codecov from test action

README.md

@@ -90,6 +90,7 @@ sudo apt-get install docker docker-compose
 Check the following links for more info on [Docker](https://www.docker.com/) and [Docker Compose](https://docs.docker.com/compose/).
 
 Aditionally, edgeboxctl needs the following bash commands available wherever it runs:
+* `arm-linux-gnueabi-gcc` (`sudo apt-get install gcc-arm*`)
 * `sh`
 * `rm`
 * `systemctl`