我尝试通过导航到angular文件夹并进行服务来在本地运行前端部分（Angular 2），但这会出现以下错误
“ serve命令需要在Angular项目中运行，但是找不到项目定义。”
我尝试在Angular / CLI中进行ng更新，但仍然给出此错误 未安装软件包：“ @ angular / cli”。正在跳过。 我需要帮助 谢谢你。
Angular CLI: 7.0.4
Node: 10.6.0
OS: win32 x64
Angular: 7.0.2
... common, compiler, compiler-cli, core, forms, http
... platform-browser, platform-browser-dynamic, router
Package Version
------------------------------------------------------
@angular-devkit/architect <error>
@angular-devkit/core <error>
@angular-devkit/schematics <error>
@angular/tsc-wrapped 0.5.2
@ngtools/webpack 1.10.2
@schematics/angular <error>
@schematics/update <error>
rxjs 6.3.3
typescript 3.1.6
webpack 2.1.0-beta.25
{
"name": "angular-src",
"version": "0.0.0",
"license": "MIT",
"angular-cli": {},
"scripts": {
"ng": "ng",
"start": "ng serve",
"test": "ng test",
"pree2e": "webdriver-manager update --standalone false --gecko false",
"e2e": "protractor"
},
"private": true,
"dependencies": {
"@angular/common": "^7.0.2",
"@angular/compiler": "^7.0.2",
"@angular/core": "^7.0.2",
"@angular/forms": "^7.0.2",
"@angular/http": "^7.0.2",
"@angular/platform-browser": "^7.0.2",
"@angular/platform-browser-dynamic": "^7.0.2",
"@angular/router": "^7.0.2",
"angular2-flash-messages": "^3.0.1",
"angular2-jwt": "^0.2.3",
"bootstrap": "^4.1.3",
"core-js": "^2.4.1",
"rxjs": "^6.3.3",
"ts-helpers": "^1.1.1",
"zone.js": "^0.8.26"
},
"devDependencies": {
"@angular/compiler-cli": "^7.0.2",
"@types/jasmine": "2.8.11",
"@types/node": "^10.12.2",
"angular-cli": "1.0.0-beta.28.3",
"codelyzer": "~4.5.0",
"jasmine-core": "3.3.0",
"jasmine-spec-reporter": "4.2.1",
"karma": "3.1.1",
"karma-chrome-launcher": "^2.0.0",
"karma-cli": "^1.0.1",
"karma-jasmine": "^1.0.2",
"karma-remap-istanbul": "^0.6.0",
"protractor": "~5.4.1",
"ts-node": "7.0.1",
"tslint": "^5.11.0",
"typescript": "~3.1.6"
}
}