.github: basic stickydisk test

.github/workflows/basic.yaml

@@ -0,0 +1,19 @@
+name: Basic Sticky Disk Test
+on:
+  workflow_dispatch:
+  push:
+  pull_request:
+
+jobs:
+  test-sticky-disk:
+    name: Test Sticky Disk
+    runs-on: blacksmith-staging
+    steps:
+      - name: Mount Sticky Disk
+        uses: useblacksmith/stickydisk@initial-commit
+        with:
+          key: foo
+          path: /shouldseethis
+
+      - name: Write test file
+        run: sudo sh -c 'echo "Hello from sticky disk" > /shouldseethis/test.txt'