all kinds of changes

made updates to remove expense and edit expense on database

get firebase expenses on start

setup test database env

test files

added expensesSummary and test for it

Setup formating for amount and createdAt

setup dev depenencies and dist folder

renamed package-lock.json with .old extenstion to allow heroku deployment

settup production build and server

setup production webpack build

remove dummy expense data

initial commit

test files

add .gitignore