Write docs

[kripsy]

It's pr with docs

[codecov]

Codecov Report

Merging #43 (52e0189) into dev-rc (a077d9b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           dev-rc      #43   +/-   ##
=======================================
  Coverage   80.30%   80.30%           
=======================================
  Files          27       27           
  Lines        2117     2117           
=======================================
  Hits         1700     1700           
  Misses        330      330           
  Partials       87       87           

Files	Coverage Δ
internal/client/config/config.go	88.46% <ø> (ø)
internal/client/config/flags.go	100.00% <ø> (ø)
internal/client/infrastrucrure/filemanager/data.go	69.49% <ø> (ø)
...l/client/infrastrucrure/filemanager/filemanager.go	83.45% <ø> (ø)
internal/client/usecase/usecase.go	69.93% <ø> (ø)
internal/server/config/config.go	91.57% <ø> (ø)
internal/server/controller/grpc_auth_controller.go	91.30% <ø> (ø)
internal/server/controller/grpc_controller_init.go	88.88% <ø> (ø)
...ternal/server/controller/grpc_secret_controller.go	63.76% <ø> (ø)
...al/server/controller/middleware_grpc_controller.go	81.65% <ø> (ø)
... and 8 more