feat(server): warning for non web target (#2026)

[Kristonitas]

• 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?

Modified existing tests inside addEntries.test.js.

Motivation / Use-Case

Help new developers (who check terminal output) to more quickly detect potential misconfiguration when developing a web app while setting target: "node". A more detailed explanation of this: #2026 (comment). I acknowledge this is something very obvious once you know about the configuration.

Breaking Changes

If anyone is doing strict validation of webpack-dev-server output and using the configuration in question, this might affect them. It should be quite easy to filter/ignore or modify.

Additional Info

I made this minimal repo with two scripts to see the different behaviour with "node" and "web" targets: https://github.com/Kristonitas/live-reload-fail

[jsf-clabot]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

[codecov]

Codecov Report

Merging #2104 (f093391) into master (8738bd1) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2104      +/-   ##
==========================================
+ Coverage   94.55%   94.57%   +0.01%     
==========================================
  Files          32       32              
  Lines        1213     1217       +4     
  Branches      339      341       +2     
==========================================
+ Hits         1147     1151       +4     
  Misses         64       64              
  Partials        2        2              

Impacted Files	Coverage Δ
lib/Server.js	97.15% <100.00%> (ø)
lib/utils/addEntries.js	100.00% <100.00%> (ø)
lib/utils/updateCompiler.js	100.00% <100.00%> (ø)

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[anikethsaha]

@Kristonitas the CLA is not signed, please sign it.

if its already signed and still showing not signed, close the PR and reopen it !

[Kristonitas]

@evilebottnawi
Can you comment on this PR?
If you think I should take another approach or if this is not worth being added let me know.

[alexander-akait]

Let's use info for this, warn may annoy developers

[alexander-akait]

Close in favor #3094, sorry for delay 😞