implement functional sharing buttons
add back google analytics
minor adjustments for sharing buttons
use abs-path for assets
deploy adjustments
correct package name of NPM
use auto-generated Procfile instead
use npm start cmd instead
unify the template expr.
need no express
encode url before assigning it as a parametre
add back license
minor fix for mobile devices
minor typo fix
response with 404 for existing non-index dir
minor improvements for better semantics
add cache mechanism with etag
add node module: etag
add mime dep
mime for md