M2MBridge updates

• M2MBridge updates are managed from the amtechM2mBridge template thing and the cloned amtechM2mBridge instance used in the configuration of the M2MBridge.
• Once a new M2MBridge image is flashed into a Raspberry Pi and the M2MBridge is configured following this form, a pre-execution script will download the M2MBridge version specified in the configured template.

Important remark: Note that this first time you run the bridge, you need to be sure that the bridge has a configured Internet connection and the configured template has a valid version. Otherwise the download will fail and the M2MBridge will not start.

• After this initial setup, the service is started and a clone of that template is generated with the same version specified in the template.
• Any further changes to that instance version will be honored by the bridge and an over-the-air update will be applied with a consequent restart of the M2MBridge service.