Add Bi-Weekly join information

docs/md/goals/join.md

@@ -1 +1,18 @@
 # join
+
+## meet & greet
+
+(virtual)
+
+### bi-weekly OST
+Feel free to join our biweekly (every even calender week) exchange round from [10.00 - 11.00](https://time.is/de/Bern) which is also the start into our [**O**pen **S**ource ~~Friday~~ **T**uesday (OST)](https://opensourcefriday.com).
+
+#### agenda
+
+ - welcome ex- and [internal participants](https://github.com/orgs/bfh/people)
+ - discuss progress and changes in our [CoP](https://www.scaledagileframework.com/communities-of-practice/) Open-Source [Board](https://github.com/orgs/bfh/projects/1/)
+   - "start at the end" : finish review column issues
+ - quick status round independent from issues
+ - *optional*: small(er) demonstrations / presentations of projects
+
+#### via BBB: [Click here to join!](https://bbb.ch-open.ch/rooms/bfh-smq-j63-snw/join)