Merge branch 'release-0.0.21' into develop
remove mailgun and added emailjs
remove email on error
added comments and create get method
added database name
comment methods and authorization method added
remove redis and reestructure middleware
installation middleware
commentarize and create authorization method
remove redis and added connect-mongo
fix typos
add new line
reformat singup body
replace email singUp
added notify text format
new email notify format
new notify email format
new notify email format
fix typos
fix typos