Added first bit of Draupnir documentation.

matrix/draupnir/README.md

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+---
+gitea: none
+include_toc: true
+---
+
+# Draupnir
+
+Draupnir is the way to do moderation. It can exchange banlists with other
+servers, and drop reports that people send into its moderation room so that
+moderators can act upon them.
+
+Start by creating a room where moderators can give Draupnir commands. This
+room should not be encrypted. Then create a user for Draupnir, this user
+should ideally be an admin user.
+
+Once you've created the user, log in as this user, maybe set an avatar, join
+the room you've created and then copy the access token. This token is used by
+the Draupnir software to login.
+
+After that, close the window or client, but
+do not logout. If you logout, the token will be invalidated.
+
+Make sure you have the right npm, Node.js, yarn and what-have-you ([see
+Draupnir's documentation](https://the-draupnir-project.github.io/draupnir-documentation/bot/setup_debian))
+and prepare the software:
+
+```
+mkdir /opt
+cd /opt
+git clone https://github.com/the-draupnir-project/Draupnir.git
+cd Draupnir
+git fetch --tags
+mkdir datastorage
+yarn global add corepack
+useradd -m draupnir
+chown -R draupnir:draupnir
+```
+
+Now, "compile" the stuff as user draupnir:
+
+```
+sudo -u draupnir bash -c "install yarn"
+sudo -u draupnir bash -c "yarn build"
+```
+
+When this is completed successfully, it's time to configure Draupnir.
+
+
+# Configuration
+
+Under `config` you'll find the default configuration file, `default.yaml`.
+Copy it to `production.yaml` and change what you must.
+
+| +---- | +---- | +---- |
+| `homeserverUrl` | `http://localhost:8008` | Where to communicate with Synapse |
+| ` rawHomeserverUrl` | `https://vm02199.example.com` | Same as `server_name` |
+| `accessToken` | <access token> | Copy from login session |
+| `password` | <password> | Password for the account |
+| `dataPath` | `/opt/Draupnir/datastorage` | Storage |
+| `managementRoom` | <room ID> | Room where moderators command Draupnir |
+
+This should give a working bot.