Add ubuntu ci

.github/workflows/setup.yml

@@ -1,8 +1,18 @@
 name: build
 on: [push, pull_request]
 jobs:
-  ci:
+  ubuntu:
-    name: bootstrap
+    name: ubuntu-bootstrap
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: build
+      env:
+        CI_MODE: true
+      run: |
+        make
+  macos:
+    name: macos-bootstrap
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@master