add ci

.github/workflows/update-agent.yml

@@ -0,0 +1,39 @@
+# Github workflow for update-agent
+
+name: update-agent
+on:
+  pull_request:
+  workflow_dispatch:
+  workflow_call:
+    secrets:
+      GIT_HUB_TOKEN:
+        required: true
+      CACHIX_AUTH_TOKEN:
+        required: false
+  push:
+    branches:
+      - main
+      - prod
+    tags:
+      - '**'
+
+jobs:
+  test:
+    runs-on: ubuntu-24.04-arm
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get -y install podman libguestfs-tools pkg-config libssl-dev build-essential cargo
+          cargo install nu --locked
+
+      - name: Build
+        run: |
+          cargo build
+
+      - name: Run functional tests
+        run: |
+          ./t/podman-runner.nu mock mock_path
+          ./t/podman-runner.nu run target/debug/orb-update-agent mock_path
+          ./t/podman-runner.nu check mock_path