Fix lib microservice about dtaas

[prasadtalasila]

Adds docs/LIB-MS.md

[ravvnen]

After this, fix CodeClimate Issues

[ravvnen]

1. I have fixed the yarn install warnings, i removed @nestjs/axios, and updated rxjs aswell as express
2. the schema does generate the schema.gql from the codebase already, using the graphqlmodule
3. I have a LIB-MS.md, but i would like to quickly draft it with you tomorrow

this is all in my dev branch -

ref to the lib-ms.md .. https://github.com/ravvnen/DTaaS/blob/dev/docs/LIB-MS.md
ref to the graphql module .. line 13 - https://github.com/ravvnen/DTaaS/blob/dev/servers/lib/src/app.module.ts

[prasadtalasila]

Completed in PR #28