Support upload files only and support prompt config

[saltbo]

Intro

Finish the issue #13

Supports

• support upload the images for the typora
• support deploy file to the static website

[codecov]

Codecov Report

Merging #14 into master will increase coverage by 2.64%.
The diff coverage is 92.18%.

@@            Coverage Diff             @@
##           master      #14      +/-   ##
==========================================
+ Coverage   87.69%   90.34%   +2.64%     
==========================================
  Files           3        5       +2     
  Lines         130      176      +46     
==========================================
+ Hits          114      159      +45     
  Misses          8        8              
- Partials        8        9       +1     

Impacted Files	Coverage Δ
engine/engine.go	81.48% <81.48%> (ø)
engine/echo.go	100.00% <100.00%> (ø)
engine/syncer.go	100.00% <100.00%> (ø)
uploader/driver.go	100.00% <100.00%> (ø)
uploader/s3.go	85.41% <100.00%> (+4.56%)	⬆️

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