Add Buildkite pipeline

Fixes #1

buildkite/pipeline.yml

@@ -0,0 +1,17 @@
+agents:
+  npm: true
+
+steps:
+  - label: "Install deps"
+    command: "npm install"
+
+  - wait
+
+  - label: "Lint"
+    command: "npm run lint"
+
+  - label: "Type check"
+    command: "npm run typecheck"
+
+  - label: "Build"
+    command: "npm run build"

package.json

@@ -4,7 +4,9 @@
   "scripts": {
     "dev": "next dev",
     "build": "next build",
-    "start": "next start"
+    "start": "next start",
+    "lint": "eslint \"{pages,components}/**/*.{js,ts,tsx,jsx}\"",
+    "typecheck": "tsc --noEmit"
   },
   "dependencies": {
     "date-fns": "^2.11.1",