feat(07-expressions): add workflow

.github/workflows/07-expressions.yaml

@@ -0,0 +1,26 @@
+name: 07 - Using Expressions
+
+on:
+  push:
+  workflow_dispatch:
+    inputs:
+      debug:
+        type: boolean
+        default: false
+
+jobs:
+  echo:
+    runs-on: ubuntu-latest
+    steps:
+      - name: '[debug] Print start-up data'
+        if: ${{ inputs.debug }}
+        run: |
+          echo "Triggered by: ${{ github.event_name }}"
+          echo "Branch: ${{ github.ref }}"
+          echo "Commit SHA: ${{ github.sha }}"
+          echo "Runner OS: ${{ runner.os }}"
+      - name: '[debug] Run when branch is main'
+        if: ${{ inputs.debug }} && ${{ github.ref }} == 'refs/heads/main'
+        run: echo "I was triggered from the main branch"
+      - name: 'Greeting'
+        run: echo "Hello, world"