Add HTTP post port mapping to docker command

[albertteoh]

Which problem is this PR solving?

• Resolves Hotrod api/traces displaying connecting refused #4356

Short description of the changes

• The HotRod example emits spans on jaeger-collector's HTTP endpoint.
• This exposes the port being listened to for spans over the HTTP endpoint to fix an error in the HotRod example.
• A minor typo is also fixed.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (6119406) 97.07% compared to head (550ac50) 97.07%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4406   +/-   ##
=======================================
  Coverage   97.07%   97.07%           
=======================================
  Files         300      300           
  Lines       17730    17730           
=======================================
+ Hits        17211    17212    +1     
+ Misses        417      416    -1     
  Partials      102      102           

Flag	Coverage Δ
unittests	97.07% <ø> (+<0.01%)	⬆️

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see 1 file with indirect coverage changes

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[albertteoh]

Closed in favour of #4407 because of the unintended jaeger-ui submodule modification.