伙计们，我有两个问题
1）我想构建一个像whatsapp这样的聊天应用程序，但我知道的唯一语言是离子3，对于数据库，我想使用mongodb 你认为我可以在这个项目中使用离子和mongodb吗？
2）当我尝试启动离子项目时，它失败并出现以下错误：
Installing dependencies may take several minutes.
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> npm i
× Running command - failed!
[ERROR] An error occurred while running npm i (exit code 1):
> node-sass@4.7.2 install C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\node-sass
> node scripts/install.js
Downloading binary from https://github.com/sass/node-sass/releases/download/v4.7.2/win32-x64-64_binding.node
Cannot download "https://github.com/sass/node-sass/releases/download/v4.7.2/win32-x64-64_binding.node":
HTTP error 404 Not Found
Hint: If github.com is not accessible in your location
try setting a proxy via HTTP_PROXY, e.g.
export HTTP_PROXY=http://example.com:1234
or configure npm proxy via
npm config set proxy http://example.com:8080
> uglifyjs-webpack-plugin@0.4.6 postinstall
C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\uglifyjs-webpack-plugin
> node lib/post_install.js
> node-sass@4.7.2 postinstall C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\node-sass
> node scripts/build.js
Building: C:\Program Files\nodejs\node.exe
C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose
--libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
gyp info it worked if it ends with ok
gyp verb cli [ 'C:\\Program Files\\nodejs\\node.exe',
gyp verb cli 'C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\node-gyp\\bin\\node-gyp.js',
gyp verb cli 'rebuild',
gyp verb cli '--verbose',
gyp verb cli '--libsass_ext=',
gyp verb cli '--libsass_cflags=',
gyp verb cli '--libsass_ldflags=',
gyp verb cli '--libsass_library=' ]
gyp info using node-gyp@3.7.0
gyp info using node@10.2.1 | win32 | x64
gyp verb command rebuild []
gyp verb command clean []
gyp verb clean removing "build" directory
gyp verb command configure []
gyp verb check python checking for Python executable "python2" in the PATH
gyp verb `which` failed Error: not found: python2
gyp verb `which` failed at getNotFoundError
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:13:12)
gyp verb `which` failed at F
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:68:19)
gyp verb `which` failed at E
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:80:29)
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:89:16
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\isexe\index.js:42:5
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\isexe\windows.js:36:5
gyp verb `which` failed at FSReqWrap.oncomplete (fs.js:182:21)
gyp verb `which` failed python2 { Error: not found: python2
gyp verb `which` failed at getNotFoundError
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:13:12)
gyp verb `which` failed at F
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:68:19)
gyp verb `which` failed at E
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:80:29)
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:89:16
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\isexe\index.js:42:5
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\isexe\windows.js:36:5
gyp verb `which` failed at FSReqWrap.oncomplete (fs.js:182:21)
gyp verb `which` failed stack:
gyp verb `which` failed 'Error: not found: python2\n at getNotFoundError
(C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\which\\which.js:13:12)\n at F
(C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\which\\which.js:68:19)\n at E
(C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\which\\which.js:80:29)\n at
C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\which\\which.js:89:16\n at
C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\isexe\\index.js:42:5\n at
C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\isexe\\windows.js:36:5\n at
FSReqWrap.oncomplete (fs.js:182:21)',
gyp verb `which` failed code: 'ENOENT' }
gyp verb check python checking for Python executable "python" in the PATH
gyp verb `which` failed Error: not found: python
gyp verb `which` failed at getNotFoundError
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:13:12)
gyp verb `which` failed at F
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:68:19)
gyp verb `which` failed at E
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:80:29)
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:89:16
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\isexe\index.js:42:5
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\isexe\windows.js:36:5
gyp verb `which` failed at FSReqWrap.oncomplete (fs.js:182:21)
gyp verb `which` failed python { Error: not found: python
gyp verb `which` failed at getNotFoundError
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:13:12)
gyp verb `which` failed at F
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:68:19)
gyp verb `which` failed at E
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:80:29)
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\which\which.js:89:16
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\isexe\index.js:42:5
gyp verb `which` failed at C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\isexe\windows.js:36:5
gyp verb `which` failed at FSReqWrap.oncomplete (fs.js:182:21)
gyp verb `which` failed stack:
gyp verb `which` failed 'Error: not found: python\n at getNotFoundError
(C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\which\\which.js:13:12)\n at F
(C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\which\\which.js:68:19)\n at E
(C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\which\\which.js:80:29)\n at
C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\which\\which.js:89:16\n at
C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\isexe\\index.js:42:5\n at
C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\isexe\\windows.js:36:5\n at
FSReqWrap.oncomplete (fs.js:182:21)',
gyp verb `which` failed code: 'ENOENT' }
gyp verb could not find "python". checking python launcher
gyp verb could not find "python". guessing location
gyp verb ensuring that file exists: C:\Python27\python.exe
gyp ERR! configure error
gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
gyp ERR! stack at PythonFinder.failNoPython
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\node-gyp\lib\configure.js:492:19)
gyp ERR! stack at PythonFinder.<anonymous>
(C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\node-gyp\lib\configure.js:517:16)
gyp ERR! stack at
C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\graceful-fs\polyfills.js:284:29
gyp ERR! stack at FSReqWrap.oncomplete (fs.js:182:21)
gyp ERR! System Windows_NT 10.0.17134
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe"
"C:\\Users\\Djokhar-pc\\Documents\\Project\\trazeapp\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
"--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd C:\Users\Djokhar-pc\Documents\Project\trazeapp\node_modules\node-sass
gyp ERR! node -v v10.2.1
gyp ERR! node-gyp -v v3.7.0
gyp ERR! not ok
Build failed with error code: 1
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted
{"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.7.2 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@4.7.2 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\Djokhar-pc\AppData\Roaming\npm-cache\_logs\2018-06-09T09_09_38_407Z-debug.log