Added more info and example

Author: siad007

README.md

@@ -3,4 +3,44 @@ Run your Phing Build in your Github Actions.
 
 > **PH**ing **I**s **N**ot **G**NU make; it's a PHP project build system or build tool based on Apache Ant. You can do anything with it that you could do with a traditional build system like GNU make, and its use of simple XML build files and extensible PHP "task" classes make it an easy-to-use and highly flexible build framework.
 
-[Example Phing Build](https://github.com/phingofficial/phing-github-action-example/runs/1203313448?check_suite_focus=true#step:4:9)
+## Configuration
+
+Create your Github Workflow config in `.github/workflows/build.yml` or similar to run your build against `build.xml`
+
+```
+name: CI
+
+on: [push]
+
+jobs:
+  build-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Phing Build
+        uses: phingofficial/phing-github-action@main
+```
+
+To execute a build with `custom/path/to/build.xml` as a phing build file use:
+
+```
+name: CI
+
+on: [push]
+
+jobs:
+  build-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Phing Build
+        uses: phingofficial/phing-github-action@main
+        with:
+            buildfile: custom/path/to/build.xml
+```
+
+## Phing in Action
+
+[Example "Phing Build" Project](https://github.com/phingofficial/phing-github-action-example/runs/1203313448?check_suite_focus=true#step:4:9)