Update README.md

Author: juliantara19

README.md

@@ -1,2 +1,46 @@
 # Force-Label
 Github Action that forces developers to add labels to their PR before it is merged.
+
+## Required Labels
+To have multiple required labels you can use `||`:
+
+```
+jobs:
+  check-labels:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Labels not added (bug, documentation, enhancement)
+      if: >
+        contains(github.event.pull_request.labels.*.name, 'bug') == false ||
+        contains(github.event.pull_request.labels.*.name, 'allocations') == false ||
+        contains(github.event.pull_request.labels.*.name, 'fe') == false
+      run: exit 1
+```
+
+## Layered Labels
+To require labels specific to parent labels you can use `needs`
+
+```
+jobs:
+  check-bug:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Labels not added (bug)
+      if: >
+        contains(github.event.pull_request.labels.*.name, 'bug') == false && 
+      run: exit 1
+
+  check-sev:
+    runs-on: ubuntu-latest
+    needs: check-bug
+    steps:
+    - uses: actions/checkout@v3
+    - name: Labels not added (sev1, sev2, sev3)
+      if: >
+        contains(github.event.pull_request.labels.*.name, 'sev1') == false && 
+        contains(github.event.pull_request.labels.*.name, 'sev2') == false && 
+        contains(github.event.pull_request.labels.*.name, 'sev3') == false
+      run: exit 1
+```