CHANGELOG: Update for beta.20210202

CHANGELOG.md

@@ -1,5 +1,34 @@
 # Snikket Server changelog
 
+## beta.20210202
+
+- Support for Raspberry Pi and other ARM-based systems
+- Add HTTP admin API for web portal
+- Add support for user groups (circles)
+- Switch to multi-container architecture (see note below)
+- Add support for update and security notifications
+- Increase file sharing limit from 10MB -> 16MB
+
+### Upgrading
+
+If you are upgrading from a previous version, this version
+requires updates to your `docker-compose.yml`. You can find
+a [new version here](https://snikket.org/service/resources/docker-compose.beta.yml).
+
+Make a backup of your current docker-compose.yml if desired,
+then put the new one in its place. For example:
+
+```
+mv docker-compose.yml docker-compose.old.yml
+wget -O docker-compose.yml https://snikket.org/service/resources/docker-compose.beta.yml
+docker-compose pull
+docker-compose up -d
+```
+
+You may also want to check out our new repository of scripts to help
+manage a self-hosted Snikket instance:
+[snikket-im/snikket-selfhosted](https://github.com/snikket-im/snikket-selfhosted)
+
 ## alpha.20200624
 
 - Add support for generating account recovery links