docs(hackathon): set time and place for rumathon 2

hackathons/rum-2-ham.md

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+# Rumathon II
+
+September 16th to 20th, Hamburg, Germany (Adobe Office)
+
+---
+
+(See the [Hackathon Archive](./README.md) for past Operations Workshops and Hackathons)
+
+### Rumathon???
+
+After the [first spontaneous rumathon](./rum-1-bsl.md), we decided that we'll need a bit more of a heads up for the second iteration, so that a larger part of the team can
+participate
+
+### Agenda
+
+> I hear this is an rumathon workshop, are you going to sample RUM all day?
+
+Trying to get as much of the virtual team together, the goal is to have high-bandwidth exchanges on the current state and next steps of RUM. We will try to keep it hands-on, so instead
+of presentations, we will rely on code settling arguments, this means we won't be hacking all the time, there will also be plenty
+of programming and coding.
+
+The main purpose of the hackathon is social: allow the team to reconnect, meet new team members for the first time, and work on
+stuff that won't fit neatly into a 45-minute Teams meeting.
+
+|      Time | Monday                                                 | Tuesday | Wednesday | Thursday | Friday  |
+| --------: | ------------------------------------------------------ | ------- | --------- | -------- | ------- |
+|   Morning | Noon: Kickoff, Introductions, Architecture             | Hacking | Hacking   | Hacking  | Demos   |
+| Afternoon | Hacking                                                | Hacking | Hacking   | Hacking  | -       |
+|   Evening | Social                                                 | Social  | Social    | Social   | -       |
+
+### Location
+
+> Where is this going to happen? Do you have a windowless conference room blocked out?
+
+In the Hamburg office. We don't have a room yet, but it will likely have windows.
+
+#### Travel
+
+Fly into Germany, then take a train to Hamburg or fly directly to HAM.
+
+### Goals
+
+> What are you planning to show at the end of the week?
+
+Put down the topic and the people that would like to discuss it:
+
+The theme of this offsite is ....
+
+#### Ideas / Suggestions / Topics Collection
+
+- add your topics here
+
+### Attendees
+
+> Who is going to be there? Can I come?
+
+If you had your hands on RUM code in the past year, you are welcome to join us. Put your name on the list, so that planning is a bit easier
+
+1. @trieloff
+
+### Preparation
+
+> What can I do to prepare for the Hackathon?
+
+1. Join `#rum-explorers` on Slack
+
+### Demos