Create shell-cheker.yml (#113)

.github/workflows/shell-cheker.yml

@@ -0,0 +1,22 @@
+name: Shell checker
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+
+  shell-checker:
+    runs-on: ubuntu-latest
+
+    steps:
+
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Shellcheck
+        run: |
+          shellcheck **/*.sh