explain action in readme

README.md

@@ -15,3 +15,39 @@ The docker image comes with include files for the following sourcemod extensions
 - [curl](https://forums.alliedmods.net/showthread.php?t=152216)
 
 Additional include files can be added by mounting them inside `/include`
+
+## Github action
+
+You can also use the github action to automatically compile your sourcepawn scripts whenever they are modified.
+
+Create a `.github/workflows/compile.yaml` with the following contents, adjusting the paths to your plugin
+
+```yaml
+name: Build sourcepawn and commit
+
+on:
+  push:
+    paths:
+      - '**.sp'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Compile sourcepawn
+        uses: spiretf/spcomp@v0.1.0
+        with:
+          source: './plugin/myplugin.sp'
+          target: './plugin/myplugin.smx'
+
+      - name: Commit files
+        run: |
+          git config --local user.email "action@github.com"
+          git config --local user.name "GitHub Action"
+          git commit -m "Compile sourcepawn" -a
+      - name: Push changes
+        uses: ad-m/github-push-action@master
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+```