Initial check-in after refactoring to use Hugo site generator with ReLearn template. HTTP Status Codes page not done--nor adwords added.

themes/relearn/.github/contributing.md

@@ -0,0 +1,28 @@
+# Guidelines
+
+## For Development
+
+- help us putting your code into production by opening a meaningful issue
+- stay simple for the user by focusing on the mantra "convention over configuration"
+- at installation the site should work reasonable without (m)any configuration
+- stay close to the Hugo way
+- don't use npm or any preprocessing, our contributors may not be front-end developers
+- document new features in exampleSite
+- don't break existing features if you don't have to
+- remove reported issue from the browser's console
+- be compatible to IE11, at least for main functionality, for Javascript this means:
+  - test in IE11
+  - check caniuse.com
+  - don't use arrow functions
+  - don't use template literals
+  - don't use other fancy new ES5/6 stuff
+
+## For Release
+
+- create releases following [semver policy](https://semver.org/)
+- we are using GitHub actions to create new releases
+- a release is based on a milestone named like the release itself - just the version number, eg: 1.1.0
+- remember that there have to be at least one closed issue assigned to the milestone
+- the release action only runs successfully if all assigned issues for this milestone are closed
+- the milestone itself will be closed during execution of the action
+- a once released milestone can not be released again