Add CI workflow

.github/workflows/build-image.yml

@@ -0,0 +1,20 @@
+name: Build KabOS Image
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v3
+
+      - name: Build image
+        run: |
+          echo "Building KabOS..."
+          docker build -t kabos .
+
+      - name: Done
+        run: echo "Build complete"