Added "npm start" - Githubissues

Added "npm start" so that it can be started by Glitch , Heroku and everyone in efficient way ..

Please describe the changes this PR makes and why it should be merged:

What does this PR do:

[ ] This PR changes internal functions, modules and/or utilities
- [ ] This PR modifies the Extension API
[ ] This PR modifies commands
- [ ] This PR changes metadata for commands (such as usage), updated in commands.js
[ ] This PR modifies Web processing and/or content
- [ ] This PR modifies static/ejs content
- [ ] This PR modifies request processing (controllers & middleware)
- [ ] This PR modifies paths to existing resources (routes)
[x] This PR only includes non-code changes, like changes to default configurations, README, typos, etc.

GAwesomeBot / bot