separate gRPC server create and serve (more code coverage)

[0xbillw]

• fix issue: "grpc: Server.RegisterService after Server.Serve for" as the service register must happen before the Serve() function
• upgrade some dependencies version

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +6.22% 🎉

Comparison is base (ef416e7) 86.95% compared to head (0b5312b) 93.18%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #10      +/-   ##
==========================================
+ Coverage   86.95%   93.18%   +6.22%     
==========================================
  Files           3        3              
  Lines          46       44       -2     
==========================================
+ Hits           40       41       +1     
+ Misses          4        2       -2     
+ Partials        2        1       -1     

Files Changed	Coverage Δ
server.go	100.00% <100.00%> (+16.66%)	⬆️

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