Add helm chart proto

[Keramblock]

Motivation and context

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have added description of my changes into CHANGELOG file
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (read github docs)
• I have increased versions of npm packages if it is necessary (cvat-canvas,
  cvat-core, cvat-data and cvat-ui)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.
• I have updated the license header for each file (see an example below)

# Copyright (C) 2021 Intel Corporation
#
# SPDX-License-Identifier: MIT

Closes #1087

[coveralls]

Coverage increased (+0.02%) to 74.071% when pulling 9d3c95a on Keramblock:add-helm-chart into d2e4ee4 on openvinotoolkit:develop.

[Keramblock]

Found some issues with ingress, will fix tomorrow
UPD: fixed

[Keramblock]

@eremeevfd thanks a lot! =)

[azhavoro]

@Keramblock Thanks for the contribution!
@ActiveChooN Could you please take a look?

[ActiveChooN]

Great work! Can you also add a small README file with quick guide how to install cvat with helm (helm dependency update, helm install cvat ., etc.), with advise to change postgres password and how use it with ingress (nginx or traefik)?

[Keramblock]

@ActiveChooN @azhavoro could please take a look one more time?

[nmanovic]

Thanks for the contribution.