Update README.md

README.md

@@ -1,2 +1,22 @@
 # trigger-circleci-workflow-action
-Triggers a CircleCI workflow from Github actions
+Triggers a CircleCI workflow from Github actions.
+
+## How to enable for your repository
+
+Add a file in your repo called `.github/main.workflow`
+
+Insert this into that file
+```
+workflow "on pull request open, trigger circleci workflow" {
+  on = "pull_request"
+  resolves = ["trigger-circleci-workflow"]
+}
+
+action "trigger-circleci-workflow" {
+  uses = "paulness/trigger-circleci-workflow-action@master"
+  secrets = ["CIRCLE_TOKEN"]
+}
+```
+
+Add your `CIRCLE_TOKEN` secret on the secrets settings page for you repository e.g.
+`https://github.com/<YOUR USERNAME/ORG>/<YOUR REPO>/settings/secrets`