readme on action usage

Author: ceelias

README.md

@@ -1 +1,36 @@
-# publish-integration-image-action
+# publish-integration-image-action
+
+This is a composite action that will publish you image to your Docker Registry.
+
+## Inputs
+
+This action requires uses the following inputs:
+
+| Name               | Type     | Description                                                                        |
+|--------------------|----------|------------------------------------------------------------------------------------|
+| `package-name`     | String   | Name that the image should be published as to Docker Hub as                        |
+| `docker-username`  | String   | Username for the docker account to publish under                                   |
+| `docker-password`  | String   | Password for the docker account to publish under                                   |
+| `push-to-registry` | String   | Determine if the built image should be pushed to registry (Default is 'false')     |
+
+The docker username and password will likely be passed by `secrets`. You must ensure your repo has access to these secret variables
+
+## Example Usage:
+
+```yaml
+jobs:
+  ...
+
+  publish-image:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - id: publish-image
+        uses: jupiterone/[email protected]
+        with:
+          package-name: 'jupiterone/graph-kubernetes'
+          docker-username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker-password: ${{ secrets.DOCKERHUB_TOKEN }}
+          push-to-registry: 'true'
+```
+