Docs: Update device and distro list

README.md

@@ -4,21 +4,10 @@ Image Builder
 This is the image builder for the Librem5 and related boards:
 
 * *devkit*: The [Librem 5 Devkit][0]
-* *ec-som*: Emcraft's [i.MX 8M SOM Starter Kit][1]
-* *imx8*: [NXPs IMX8M Evaluation Kit][2]
-* *imx6*: The Bounday Devices [Nit6QP_MAX][3]
+* *librem5r1*, *librem5r2*, *librem5r3*, *librem5r4*: [Librem 5][5]
 * *qemu-x86_64*: The [QEMU Image][4]
 
-It supports various distributions (PureOS *laboratory* and *purple*, Debian
-*buster*).  Additionally it can add our on commit built CI packages to get
-the latest versions of the Librem 5 related sofware.
-
-Furthermore it can incorporate different kernel versions:
-
-* *latest*: Fetch the most recently built kernel
-* *ci*: deprecated, don't use
-* *unstable*: Pre release kernels (that got some testing)
-* *stable*: Released kernels (none of them exist yet)
+It supports various distributions (PureOS *byzantium* and *amber-phone*.
 
 So to build an image with all the latest software you'd use:
 
@@ -71,3 +60,4 @@ You can run tests against an installed board using
 [2]: https://www.nxp.com/support/developer-resources/run-time-software/i.mx-developer-resources/evaluation-kit-for-the-i.mx-8m-applications-processor:MCIMX8M-EVK
 [3]: https://boundarydevices.com/product/nitrogen6max/
 [4]: https://developer.puri.sm/Librem5/Development_Environment/Boards/qemu.html#qemu
+[5]: https://developer.puri.sm/Librem5/Hardware_Reference.html#librem-5