Add gh workflow to run tests on PRs (#108)

.github/workflows/build.yml

@@ -1,3 +1,5 @@
+name: Build
+
 on:
   push:
     branches:

.github/workflows/test.yaml

@@ -0,0 +1,23 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - master
+    paths-ignore:
+    - 'runner/**'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: Test
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Install kubebuilder
+      run: |
+        curl -L -O https://github.com/kubernetes-sigs/kubebuilder/releases/download/v2.2.0/kubebuilder_2.2.0_linux_amd64.tar.gz
+        tar zxvf kubebuilder_2.2.0_linux_amd64.tar.gz
+        sudo mv kubebuilder_2.2.0_linux_amd64 /usr/local/kubebuilder
+    - name: Run tests
+      run: make test