Update npm scripts and documentation (#61)

- Simplify start script by combining build:watch and nodemon
- Update CONTRIBUTING.md to reference npm start instead of npm run dev
- Fix build:watch script to properly pass --watch flag

Co-authored-by: Claude <noreply@anthropic.com>

Author: domdomegg

CONTRIBUTING.md

@@ -3,7 +3,7 @@
 PRs are welcomed! To get started developing:
 1. Install Node.js and NPM
 2. Install dependencies with `npm install`
-3. Run `npm run dev` to run the dev server
+3. Run `npm start` to run the server
 4. Run `npm test` to run tests with Jest
 
 You can run `FILL_DEMO=true npm run test -- 'test/demo.test.ts'` to populate sample data into your locally running server.

package.json

@@ -19,16 +19,15 @@
     "branding"
   ],
   "scripts": {
-    "dev": "npm run build:watch && npm run start",
-    "start": "nodemon ./dist/cli.js",
+    "start": "npm run build:watch & nodemon ./dist/cli.js",
     "test": "vitest run && npm run test:binary_exists",
     "test:binary_exists": "npm run prepublishOnly && node -e \"require('fs').access(require('./package.json').bin['aws-ses-v2-local'], (err) => process.exit(err ? 1 : 0))\"",
     "test:watch": "vitest",
     "lint": "eslint",
     "format": "eslint --fix",
     "clean": "rm -rf dist",
     "build": "tsc --project tsconfig.build.json",
-    "build:watch": "npm run build --watch",
+    "build:watch": "npm run build -- --watch",
     "prepublishOnly": "npm run clean && npm run build",
     "build:docker": "docker build -t $DOCKER_IMAGE .",
     "publish:docker": "docker push $DOCKER_IMAGE"