Add MK404

Author: 3d-gussner

Community_made.md

@@ -13,5 +13,24 @@ Start `./PF-build.sh` and follow the instructions
 
 Help `./PF-build.sh -h`
 
+# MK404 Simulator
+
+## MK404-build.sh 
+**MK404 is a comminuty 3d printer simulator created by @vintagepc**
+Please checkout and support his github repository [MK404](https://github.com/vintagepc/MK404) and the [MK404 Wiki](https://github.com/vintagepc/MK404/wiki)
+
+At this moment the `MK404-build.sh` script is only supported on Linux
+- `MK404-build.sh`
+  - Maintainers: **@3d-gussner**
+  - Co-maintainers:
+  - Contributors:
+  - [X] **Active**      since August 2021
+  - [X] **Maintained**  since August 2022
+
+### How-to use MK404-build.sh
+After compiling with `PF-build.sh` you get the option to start the `MK404` simulator with the fresh compiled firmware. (Linux only at this moment)
+
+Help `./MK404-build.sh -h`
+
 ## Translations
 - see [/lang/Community_made_translations.md](https://github.com/prusa3d/Prusa-Firmware/blob/MK3/lang/Community_made_translations.md)