node setup run ,getting issue. please advise,while doing node setup getting below issue on apigee course, please advise

[#1]

prompt: Please provide the Firebase Host name: apigee-developer-trainin-NNNNX.firebaseio.com

Modified files: ./edge-developer-training-backend/edge.json 'mvn' is not recognized as an internal or external command, operable program or batch file. (node:7240)

UnhandledPromiseRejectionWarning: #<Object> (node:7240) UnhandledPromiseRejectionWarning:

Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1) (node:7240) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code. 'mvn' is not recognized as an internal or external command, operable program or batch file. (node:7240) UnhandledPromiseRejectionWarning: #<Object> (node:7240)

UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)