check origin header for websocket connection

[sokra]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

no

Motivation / Use-Case

security fix

Breaking Changes

websocket is now checked for origin

Additional Info

[alexander-akait]

Need fix lint problems

[codecov]

Codecov Report

Merging #1603 into master will increase coverage by 0.03%.
The diff coverage is 60%.

@@            Coverage Diff            @@
##           master   #1603      +/-   ##
=========================================
+ Coverage   74.06%   74.1%   +0.03%     
=========================================
  Files          10      10              
  Lines         671     672       +1     
=========================================
+ Hits          497     498       +1     
  Misses        174     174

Impacted Files	Coverage Δ
lib/Server.js	81.47% <60%> (+0.05%)	⬆️

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