add standard js for linting and tests

assets/package.json

@@ -4,7 +4,9 @@
   "license": "MIT",
   "scripts": {
     "deploy": "NODE_ENV=production webpack --mode production",
-    "watch": "webpack --mode development --watch --watch-options-stdin"
+    "watch": "webpack --mode development --watch --watch-options-stdin",
+    "format": "standard --fix",
+    "test": "standard"
   },
   "dependencies": {
     "@fortawesome/fontawesome-free": "^5.15.4",
@@ -30,6 +32,7 @@
     "postcss-loader": "^6.1.1",
     "postcss-preset-env": "^6.7.0",
     "sass-loader": "^12.1.0",
+    "standard": "^16.0.4",
     "style-loader": "^3.2.1",
     "tailwindcss": "^2.2.7",
     "terser-webpack-plugin": "^5.1.3",

mix.exs

@@ -69,7 +69,9 @@ defmodule Cannery.MixProject do
       setup: ["deps.get", "compile", "ecto.setup", "cmd npm install --prefix assets"],
       "ecto.setup": ["ecto.create", "ecto.migrate", "run priv/repo/seeds.exs"],
       "ecto.reset": ["ecto.drop", "ecto.setup"],
+      format: ["cmd npm run format --prefix assets", "format"],
       test: [
+        "cmd npm run test --prefix assets",
         "dialyzer",
         "credo --strict",
         "format --check-formatted",