Add Dockerfile

[ghosind]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Add the dockerfile to dockerize the dashboard.

Which issue(s) this PR fixes:

For #27

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[ghosind]

I have a small question. The login interface requires a token. How to obtain this token?

Hi @wbc6080 , It requires a k8s service account with the admin cluster role, and uses kubectl create token <service-account> command to obtain the token.

there is an example to obtain a token:

kubectl create serviceaccount test-user -n kube-system
kubectl create clusterrolebinding test-user-binding --clusterrole=cluster-admin --serviceaccount=kube-system:test-user -n kube-system
kubectl create token test-user --namespace kube-system

[kubeedge-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fisherxu

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