Configuration for CI with GitHub Actions; fixes #13 (#21)

Configure CI with GitHub Actions; fixes #13

.github/workflows/yarn.yml

@@ -0,0 +1,27 @@
+name: CI
+on: [push]
+
+jobs:
+  build:
+    name: CI
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set Node.js 16.x
+        uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+
+      - name: Run install
+        uses: borales/actions-yarn@v4
+        with:
+          cmd: install
+      - name: Build production bundle
+        uses: borales/actions-yarn@v4
+        with:
+          cmd: build
+      - name: Lint # This might actually be unnecessary because eslint might run as part of the build process, but to be explicit...
+        uses: borales/actions-yarn@v4
+        with:
+          cmd: eslint src