Add makefile

.eslintrc

@@ -0,0 +1,3 @@
+{
+  "extends": ["react-app", "prettier"]
+}

Makefile

@@ -0,0 +1,11 @@
+serve:
+	./node_modules/.bin/webpack-dev-server --mode development
+
+build:
+	./node_modules/.bin/webpack --mode production
+
+lint:
+	./node_modules/.bin/eslint src
+
+format:
+	./node_modules/.bin/prettier --write src/**/*.js

README.md

@@ -2,7 +2,7 @@
 
 ## Available scripts
 
-- `npm start`: starts a development server
-- `npm run build`: make a production build
-- `npm run lint`: lint js files using eslint
-- `npm run format`: format js files using prettier
+- `npm start`: starts a development server (`make` or `make serve`)
+- `npm run build`: make a production build (`make build`)
+- `npm run lint`: lint js files using eslint (`make lint`)
+- `npm run format`: format js files using prettier (`make format`)