hello i run "npm run pwa" and i got an error like as below "> mdb-pwa@0.0.0 pwa E:\Demo\mdb-pwa > rm -rf dist && ng build --prod && cd dist && http-server -p 8080 && cd .. 'rm' is not recognized as an internal or external command, operable program or batch file. npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! mdb-pwa@0.0.0 pwa: `rm -rf dist && ng build --prod && cd dist && http-server -p 8080 && cd ..` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the mdb-pwa@0.0.0 pwa 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\TEDY PRATAMA PUTRA\AppData\Roaming\npm-cache\_logs\2018-10-02T06_40_44_292Z-debug.log" Can you help me with this error thanks.

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