add experiment template

website/src/docs/experiments/template.md

@@ -0,0 +1,37 @@
+---
+title: '--- Template ---'
+---
+
+# \{Name of Experiment\} (#\{Issue\})
+
+::: warning
+
+All experimental features are subject to breaking changes and/or removal _at any
+time_. We strongly recommend that you do not use these features in a production
+environment. They are intended for testing and feedback only.
+
+:::
+
+::: warning
+
+This experiment breaks the following functionality:
+
+- \{list any existing functionality that will be broken by this experiment\}
+- \{if there are no breaking changes, remove this admonition\}
+
+:::
+
+:::info
+
+To enable this experiment, set the environment variable: `TASK_X_{feature}=1`.
+Check out [our guide to enabling experiments ][enabling-experiments] for more
+information.
+
+:::
+
+\{Short description of the feature\}
+
+\{Short explanation of how users should migrate to the new behavior\}
+
+[enabling-experiments]: /experiments#enabling-experiments
+