Add Github Actions build (#1000)

.github/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: ci
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Build
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Build
+        run: cd build && ./build.sh

build/build.sh

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -e
+
 DOC_FILES="../README.md"
 IMG_FILES="../src/icons/bypass.png"