Initial Homepage dashboard configuration

Services, widgets, layout and settings for the homelab dashboard.
Secrets are externalized via {{HOMEPAGE_VAR_*}} placeholders and
supplied through a local .env file (not committed).

docker.yaml

@@ -0,0 +1,10 @@
+---
+# For configuration options and examples, please see:
+# https://gethomepage.dev/configs/docker/
+
+# my-docker:
+#   host: 127.0.0.1
+#   port: 2375
+
+# my-docker:
+#   socket: /var/run/docker.sock