add CI

There may be issues if it can't upload a 1.6GB artifact. May have to use the split zip version if it fails.

.github/workflows/CI.yml

@@ -0,0 +1,43 @@
+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the workflow will run
+on:
+  [push]
+
+  # Allows you to run this workflow manually from the Actions tab
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+
+      # Runs a single command using the runners shell
+      - name: Build
+        run: sudo ./build.sh
+
+      # Runs a set of commands using the runners shell
+      - name: print sha256sum
+        run: cat output/sha256
+        
+      - name: Generate Tag
+        id: tag
+        run: |
+          VER=$(egrep ^KERNEL_VERSION build.sh|cut -d= -f2)
+          echo Version is $VER
+          echo "::set-output name=tag::${VER}"
+        
+      - name: Upload iso artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: mbp-ubuntu-${{ steps.tag.outputs.tag }}
+          path: ${{ github.workspace }}/*.iso
+