Add OTA functionality to an existing Yocto project

If you already have a Yocto-based project, you can start your functional integration with HERE OTA Connect by following these four steps:

Clone the meta-updater layer and add it to your bblayers.conf.
Clone a BSP integration layer (meta-updater-${PLATFORM}, e.g. meta-updater-raspberrypi) and add it to your conf/bblayers.conf. If your board isn’t supported yet, you could write a BSP integration for it yourself. See the [Adding support for your board] section for the details.
Set up your distro. If you are using "poky", the default distro in Yocto, you can change it in your conf/local.conf to poky-sota or to poky-sota-systemd. Alternatively, if you are using your own or a third-party distro configuration, you can add the following parameters to it, thus combining the capabilities of your distro with meta-updater features.
```
INHERIT += " sota"
DISTRO_FEATURES_append = " sota systemd usrmerge"
```
Create a provisioning key and add it to your local.conf.

You can then build your image as usual, with bitbake. After building the root file system, bitbake will then create an OSTree-enabled version of it, commit it to your local OSTree repo, and push it to OTA Connect. Additionally, a live disk image will be created (normally named ${IMAGE_NAME}.wic e.g. core-image-minimal-raspberrypi3.wic).