v1.3.0

Thanks to Suggestions made by @derlaft in #44, Image sizes have been reduced drastically.

Changes

• docker: restructure Dockerfiles for klipper, moonraker and ustreamer

Notes

Changes concerning Images are first implemented in the following Tags:

Image	Tag	Digest	armv7 size before	armv7 size after
klipper	a42f615	0198c7579c77a3f18dcac2faafcda5c772ffb5492037d049d8acc50402a0be50	309.54M	82.37M
klipper:mcu	a42f615-mcu	1623b010388115830317e867b507a5f17f2d6b8c32a58cf98f649947521a3022	553.7M	459.71M
moonraker	dde9bcc	98f5587e512d13c3c12bae442824c2d8eba419291d9697b835dad52efae9268b	112.24M	89.3M
ustreamer	bf78d8f	4d50df64cc3752af640f8d92e1c0aa4ae362372ef06fc4c6711432030259b25d	49.68M	38.12M

Full Changelog: v1.2.1...v1.3.0