Config file read

fixed read config from file if the file does not exist, then moves on to system environment vars

Config File support

This closes enhancement: #15

• Added Enum entries for env variables …
• Added config file reader

Update libs and db cleanup

Updated libs:

• scala: 2.13.2
• monix 3.2.1

##Clean up
Cleaned up the database object

Database cleanup

• Cleaned up the database functions

Environemnt variable validation

• added validation for the environment variable for the database name.

Implicit conversions

Changes

• Added implicit conversions
• Added case class for ordered Files

Updated libraries

• updated sbt version, updated mongodb
• updated README.md
• improved error handle with logging

Updated libraries

Updated the cats library to v2.1.1.

Added logging

Added some logging to help with debugging.
By Default the logging level is set to Error.

Librariess updates

Updated the following libraries:

• cats-core 2.1.0
• mongo-scala-driver" 2.8.0