docs: add changelog

Author: ukkopahis

docs/Updates/Changelog.md

@@ -0,0 +1,27 @@
+## Latest
+<!-- what's in open pull requests that will be merged at an unknown date -->
+
+- New service: [Duckdns](../Containers/Duckdns.md), deprecates the
+  `duck/duck.sh` script.
+- Fixes to [bash aliases](../Basic_setup/Docker.md#aliases)
+- Documentation development made easier: [Writing documentation](
+  ../Developers/index.md#writing-documentation)
+
+## 2022-04-26
+
+- New service: [Syncthing](../Containers/Syncthing.md)
+- Zigbee2MQTT: [Service definition change](
+  ../Containers/Zigbee2MQTT.md#service-definition-change)
+- Dropping support for Home Assistant Supervised. Home Assistant **Container**
+  still available.
+- [Homebridge](../Containers/Homebridge.md) is now on port 8581
+- Documentation: Added: [Git Setup](../Developers/Git-Setup.md). Large changes
+  to: [Updates](../Updates/index.md), [InfluxDB](../Containers//InfluxDB.md),
+  [Grafana](../Containers/Grafana.md), [Pi-hole](../Containers/Pi-hole.md),
+  [Docker Logging](../Basic_setup/Docker.md#logging).
+
+## 2022-01-18
+
+- Networking change **requiring** [migration](
+  https://github.com/SensorsIot/IOTstack/#significant-change-to-networking).
+