docs: how to configure the address family (#819)

The environment variable `HCLOUD_INSTANCES_ADDRESS_FAMILY` controls the address family used when initializing a node. This variable has not been documented yet, which caused an issue in #803. --------- Co-authored-by: Jonas L. <[email protected]>
hetznercloud · Dec 16, 2024 · e827ade · e827ade
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+# How to configure the address family
+
+To control the address family used when initializing a node, the `HCLOUD_INSTANCES_ADDRESS_FAMILY` environment variable can be set to `ipv4`, `ipv6` or `dualstack`. By default, the value is set to `ipv4`.
+
+## Configuration via Helm
+
+```yaml
+# values.yaml
+---
+env:
+  HCLOUD_INSTANCES_ADDRESS_FAMILY:
+    value: "dualstack"
+```