Added funding information

.github/FUNDING.yml

@@ -0,0 +1,11 @@
+# TODO: We should try to automat creation of this.
+# - Look for sponsor links for projects listed in package.json
+# - Add Dataskydds donate page: https://webbkoll.dataskydd.net/en/donate
+# - Add tools /libraries that are very helpfull
+
+custom: [
+    "https://github.com/sitespeedio/sitespeed.io",
+    "https://github.com/YellowLabTools/YellowLabTools",
+    "https://webbkoll.dataskydd.net/en/donate",
+    "https://github.com/Webperf-se/webperf_core/blob/main/docs/CONTRIBUTING.md#funding"
+  ]

docs/CONTRIBUTING.md

@@ -90,3 +90,15 @@ The license used is the [MIT license](https://en.wikipedia.org/wiki/MIT_License)
 **Let's Connect on Slack! 🚀**
 
 Hey there! 👋 Got a question or just wanna chat about the project? Jump into our [Slack channel](https://webperf.se/articles/webperf-pa-slack/)! We've got a super chill community over at [Webperf on Slack](https://webperf.se/articles/webperf-pa-slack/), and we're all about helping each other out. Don't be shy, come say hi! 🎉
+
+## Funding
+
+We use some great libraries and tools to make webperf_core happen,
+if you love it, please consider funding/supporting some of the projects we use either by
+using the Sponsor button or by manually visiting one of them:
+- [sitespeed.io](https://github.com/sitespeedio/sitespeed.io)
+- [Yellow Lab Tools](https://github.com/YellowLabTools/YellowLabTools)
+- [Webbkoll - Dataskydd](https://webbkoll.dataskydd.net/en/donate)
+
+If we use your tool, library and you have started a funding/sponsor/support, please let us
+know so we can add you :)