Simple pure npm scripts build process

package.json

{
  "name": "project-name",
  "description": "Template for static sites",
  "version": "1.0.0",
  "homepage": "http://www.project-name.com",
  "author": {
    "name": "Adam Reis",
    "url": "http://adam.reis.nz"
  },
  "license": "UNLICENSED",
  "private": true,
  "repository": {
    "type": "git",
    "url": ""
  },
  "bugs": {
    "url": ""
  },
  "engines": {
    "node": ">=6.3.0",
    "npm": ">=3.10.5"
  },
  "scripts": {
    "//": " --- GENERAL ---",
    "reinstall": "rimraf node_modules && npm cache clean && npm install",
    "start": "run-p serve watch",

    "//": " --- CSS --- ",
    "css:dev": "node-sass src/scss/index.scss --output-style compressed > dist/css/app.css",
    "css:prod": "node-sass src/scss/index.scss --output-style compressed | postcss -u autoprefixer -b 'last 2 versions' > dist/css/app.css",

    "//": " --- JAVASCRIPT --- ",
    "js:dev": "babel src/js | uglifyjs > dist/js/app.js",
    "js:prod": "babel src/js | uglifyjs -m -c > dist/js/app.js",
    "js:vendor": "uglifyjs vendor/*.js > dist/js/vendor.js",

    "//": " --- BUILD (GENERIC) --- ",
    "clean": "rimraf dist",
    "mkdirs": "mkdir -p dist/js && mkdir -p dist/css",
    "copy:assets": "cp -r assets/* dist",
    "copy:html": "find src -name '*.html' -type f -exec cp {} dist \\;",
    "copy": "npm run copy:assets && npm run copy:html",

    "//": " --- BUILD (DEVELOPMENT) --- ",
    "prebuild:dev": "npm run clean && npm run mkdirs && npm run copy",
    "build:dev": "npm run css:dev && npm run js:dev && npm run js:vendor",

    "//": " --- BUILD (PRODUCTION) --- ",
    "prebuild:prod": "npm run clean && npm run mkdirs && npm run copy",
    "build:prod": "npm run css:prod && npm run js:prod && npm run js:vendor",
    "postbuild:prod": "npm run hash",

    "//": " --- HASHING --- ",
    "hash": "hashmark **/(app|vendor).* -d md5 -l 8 -c dist '{dir}/{name}.{hash}{ext}' | replaceinfiles -S -s dist/**/*.html",
    "posthash": "rm dist/css/app.css && rm dist/js/app.js",

    "//": " --- LINTING & TESTING --- ",
    "lint": "eslint src/js --fix",
    "pretest": "npm run lint",
    "test": "npm run istanbul -s",
    "posttest": "npm run coverage -s",
    "istanbul": "istanbul cover ./node_modules/mocha/bin/_mocha 'test/**/*.spec.js'",
    "coverage": "open -a 'Google Chrome' ./coverage/lcov-report/index.html",

    "//": " --- SERVING --- ",
    "kill": "lsof -n -i:8080 | grep LISTEN | awk '{print $2}' | xargs kill -9",
    "preserve": "npm run build:dev && npm run kill",
    "serve": "browser-sync start -s --files 'dist/**/*.(js|css|html)' --ss 'dist' --port 8080 --reload-debounce 500",

    "//": " --- WATCHING --- ",
    "watch:assets": "onchange 'assets/**/*' -- npm run copy:assets",
    "watch:vendor": "onchange 'vendor/**/*.js' -- npm run js:vendor",
    "watch:html": "onchange 'src/**/*.html' -- npm run copy:html",
    "watch:css": "onchange 'src/**/*.scss' -- npm run css:dev",
    "watch:js": "onchange 'src/**/*.js' -- npm run js:dev",
    "watch": "run-p watch:css watch:js watch:html watch:assets",

    "//": " --- DEPLOYMENT & ZIP --- ",
    "postversion": "git push && git push --tags",
    "predeploy": "npm run build:prod",
    "deploy": "firebase deploy --project project-name",
    "prezip": "npm run build:prod",
    "zip": "cd dist && zip -r -X ../app.zip ."
  },
  "devDependencies": {
    "autoprefixer": "^6.3.7",
    "babel-cli": "^6.11.4",
    "babel-preset-es2015": "^6.9.0",
    "browser-sync": "^2.14.0",
    "chai": "^3.5.0",
    "chai-as-promised": "^5.3.0",
    "dirty-chai": "^1.2.2",
    "eslint": "^3.2.2",
    "firebase-tools": "^3.0.5",
    "hashmark": "^3.1.0",
    "istanbul": "^1.0.0-alpha.2",
    "mocha": "^2.5.3",
    "mocha-clean": "^1.0.0",
    "npm-run-all": "^4.1.5",
    "node-sass": "^3.8.0",
    "onchange": "^2.5.0",
    "postcss-cli": "^2.5.2",
    "replaceinfiles": "^1.1.4",
    "rimraf": "^2.5.4",
    "uglify-js": "^2.7.0"
  }
}

Hi ya'll, I just wrote an article that might be helpful to this discussion:
https://dev.to/yaireo/automate-npm-package-publish-git-versioning-5cfp

L41 is not working - in VSCode terminal (Windows) I have error:

find: missing argument to `-exec'

Trying this code with no success:

"copy:html": "find src -name \"*.html\" -type f -exec cp {} dist \\;"