Add a full example yaml file to the README for easy copy-pasting

README.md

@@ -23,6 +23,26 @@ versions available.  Each version of the Fourmolu Action generally has a
 corresponding version of `fourmolu`.  Make sure you pick a Fourmolu Action
 version that uses the version of `fourmolu` you use locally.
 
+### Full Example
+
+Here's a full YAML file you can copy and paste into your repo that runs
+`fourmolu-action`.  Add this as a file like `.github/workflows/fourmolu.yaml`.
+This Workflow will run everytime you push to a branch.
+
+```yaml
+name: fourmolu
+on: push
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      # Note that you must checkout your code before running fourmolu/fourmolu-action
+      - uses: actions/checkout@v2
+      - uses: fourmolu/fourmolu-action@v1
+```
+
+### Example with more Options
+
 Here's a more complicated example that shows more options being used:
 
 ```yaml
@@ -39,7 +59,7 @@ Here's a more complicated example that shows more options being used:
     extra-args: "--indent-wheres true"
 ```
 
-## Example Usage with Build Matrix
+### Example Usage with Build Matrix
 
 If you are using a build matrix, then it is more efficient to have a
 separate job for checking of formatting:
@@ -65,6 +85,9 @@ passes.
 The available options are defined in [`./action.yml`](./action.yml).  See that
 file for more explanation.
 
+<!-- fourmolu-action currently doesn't support running on Windows. -->
+<!--
+
 ## Windows
 
 If you are running a workflow on Windows, be wary of [Git's
@@ -76,6 +99,8 @@ disable `core.autocrlf`:
 $ git config --global core.autocrlf false
 ```
 
+-->
+
 ## Hacking on this repo
 
 In order to do development on this repo, you first need to install NodeJS and