Update README.md

Author: felixp8

README.md

@@ -1,2 +1,36 @@
 # dispatch-and-wait
-A GitHub Action that triggers a workflow and waits for it to succeed before proceeding
+A GitHub Action that triggers a workflow and waits for it to succeed before proceeding. Largely based off of [Trigger Workflow and Wait](https://github.com/convictional/trigger-workflow-and-wait).
+
+## Arguments
+Name | Required | Default | Description
+---- | -------- | ------- | -----------
+`owner` | true | N/A | Owner of the repo where the workflow is to be triggered.
+`repo` | true | N/A | The repo where the workflow is to be triggered.
+`token` | true | N/A | An access token with write permissions to `repo`.
+`event_type` | true | N/A | The event type parameter to be passed in the repository dispatch request.
+`client_payload` | false | `"{}"` | The client payload parameter to be passed in the repository dispatch request. Should be in the format `'{"key1": "value1", "key2": "value2"}'`.
+`wait_time` | false | `10` | Time to wait between workflow status checks, in seconds.
+`max_time` | false | `60` | Maximum time to wait for the workflow to finish before exiting, in seconds.
+
+## Example usages
+Basic use with user-added secret called `ACCESS_TOKEN`:
+```
+- uses: felixp8/[email protected]
+  with:
+    owner: username
+    repo: reponame
+    token: ${{ secrets.ACCESS_TOKEN }}
+    event_type: ping
+```
+Use with default `GITHUB_TOKEN` and optional inputs:
+```
+- uses: felixp8/[email protected]
+  with:
+    owner: username
+    repo: reponame
+    token: ${{ secrets.GITHUB_TOKEN }}
+    event_type: ping
+    client_payload: '{"ref": "master"}'
+    wait_time: 5
+    max_time: 120
+```