Add self test

.github/workflows/integration.yml

@@ -0,0 +1,11 @@
+name: Integration Test
+on: [push]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Self test
+
+        # Put your action repo here
+        uses: jacobtomlinson/go-container-action@master

README.md

@@ -2,8 +2,9 @@
 
 [![Action Template](https://img.shields.io/badge/Action%20Template-Go%20Container%20Action-blue.svg?colorA=24292e&colorB=0366d6&style=flat&longCache=true&logo=data:image/png;base64,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)](https://github.com/jacobtomlinson/go-container-action)
 [![Actions Status](https://github.com/jacobtomlinson/go-container-action/workflows/Build/badge.svg)](https://github.com/jacobtomlinson/go-container-action/actions)
+[![Actions Status](https://github.com/jacobtomlinson/go-container-action/workflows/Integration%20Test/badge.svg)](https://github.com/jacobtomlinson/go-container-action/actions)
 
-This template contains a small Go application which will be built into a minimal [Container Action](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/creating-a-docker-container-action). Our final container from this template is ~3MB, yours may be a little bigger once you add some code, but it'll still be tiny!
+This is a template for creating GitHub actions and contains a small Go application which will be built into a minimal [Container Action](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/creating-a-docker-container-action). Our final container from this template is ~3MB, yours may be a little bigger once you add some code, but it'll still be tiny!
 
 In `main.go` you will find a small example of accessing Action inputs and returning Action outputs. For more information on communicating with the workflow see the [development tools for GitHub Actions](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/development-tools-for-github-actions#setting-an-actions-status-using-exit-codes).
 
@@ -44,7 +45,7 @@ jobs:
 
 | Output                                             | Description                                        |
 |------------------------------------------------------|-----------------------------------------------|
-| `myOutput`  | An example output    |
+| `myOutput`  | An example output (returns 'Hello world')    |
 
 ## Examples