Added X-Frame-Options: deny

[azhavoro]

Motivation and context

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have created a changelog fragment
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (see 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.

[codecov]

Codecov Report

Merging #6992 (2224bca) into develop (b450b44) will increase coverage by 0.00%.
Report is 5 commits behind head on develop.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #6992   +/-   ##
========================================
  Coverage    82.59%   82.59%           
========================================
  Files          360      360           
  Lines        38926    38926           
  Branches      3570     3570           
========================================
+ Hits         32150    32151    +1     
+ Misses        6776     6775    -1     

Components	Coverage Δ
cvat-ui	77.61% <ø> (+<0.01%)	⬆️
cvat-server	87.16% <ø> (ø)