Scripts: get rid of `dev-up` and `dev-up-win` scripts

They used to be necessary when we did OS-specific stuff in here, but
we're no longer, and `foo && bar` is supported by both *nixes and Windows

docs/development.md

@@ -2,24 +2,21 @@
 
 ## Setup
 
-First, clone the project
+First, clone the project:
 
 ```bash
 git clone https://github.com/nativefier/nativefier.git
 cd nativefier
 ```
 
-Install dependencies for both the CLI and the Electron app:
+Install dependencies (for both the CLI and the Electron app):
 
 ```bash
-# Under Linux and macOS:
-npm run dev-up
-
-# Under Windows:
-npm run dev-up-win
+npm install
 ```
 
-Build nativefier:
+The above `npm install` will build automatically (through the `prepare` hook).
+When you need to re-build Nativefier,
 
 ```bash
 npm run build

package.json

@@ -33,8 +33,6 @@
     "build-app-static": "ncp app/src/static/ app/lib/static/ && ncp app/dist/preload.js app/lib/preload.js && ncp app/dist/preload.js.map app/lib/preload.js.map",
     "build": "npm run clean && tsc --build . app && npm run build-app && npm run build-app-static",
     "build:watch": "tsc --build . app --watch",
-    "dev-up": "npm install && cd ./app && npm install && cd ..",
-    "dev-up-win": "npm install & cd app & npm install & cd ..",
     "changelog": "./docs/generate-changelog",
     "ci": "npm run lint && npm test",
     "clean": "rimraf lib/ app/lib/ app/dist/",
@@ -43,7 +41,7 @@
     "lint:format": "prettier --write 'src/**/*.js' 'app/src/**/*.js'",
     "lint": "eslint . --ext .ts",
     "list-outdated-deps": "npm out; cd app && npm out; true",
-    "prepare": "cd ./app && npm install && cd .. && npm run build",
+    "prepare": "cd app && npm install && cd .. && npm run build",
     "test:integration": "jest --testRegex '.*integration-test.js'",
     "test:manual": "npm run build && ./docs/manual-test",
     "test:unit": "jest",