added preview as featured and stripped readme from outdated content

README.md

@@ -1,12 +1,7 @@
 # lnxpcs - GNU/Linux/OpenSource related pictures
-![Featured Image](https://i.redditmedia.com/204DH0Hxad9tCb9rFA6b0ASNP06lp52DnivkC1saYlQ.png?s=d62ac5fe7a234e43b25506ad04ed75d4)
+![Featured Image](preview.jpg)
 
-## you can support new pictures by purchasing a shirt or hoodie with one of the prints. the previews and links are available at **[linux.pictures](https://linux.pictures)** website. but we really don't mind if you download the high resolutions image from this repo and make a sticker, poster or shirt yourself.
 
 ### license
 
 all images are distributed under idgaf license. it means that you can use provided designs for any noncommercial purposes like creation of handout materials for conferences and meet-ups, printing wall posters for home and office and so on, but if you violate the license we will most probably do nothing, because we don't give a fuck.
-
-### custom requests
-
-for custom requests please create an issue or send us an [email](mailto:jstpcs@protonmail.com).