add a favicon to the application

[edaniszewski]

No description provided.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (v3/staging@8410c63). Click here to learn what that means.
The diff coverage is 0%.

@@              Coverage Diff              @@
##             v3/staging     #275   +/-   ##
=============================================
  Coverage              ?   86.44%           
=============================================
  Files                 ?       58           
  Lines                 ?     1151           
  Branches              ?        0           
=============================================
  Hits                  ?      995           
  Misses                ?      156           
  Partials              ?        0

Impacted Files	Coverage Δ
synse_server/app.py	33.33% <0%> (ø)

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