CI: run lint, test, build on PRs and main (#69)

Co-authored-by: CI Bot <ci@example.com>

Author: harlantwood

.github/workflows/checks.yaml

@@ -0,0 +1,37 @@
+name: checks
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  lint:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+      - run: npm ci
+      - run: npm run lint
+
+  test:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+      - run: npm ci
+      - run: npm run test:coverage
+
+  build: # sanity check that build does not throw errors
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+      - run: npm ci
+      - run: npm run build