feature revisit docker setup & add circle ci config for develop deployments

[mahesh-naxa]

Changes:

• removed docker-compose.override.yml in favor of a docker-compose.override.sample.yml, that people can edit & is untracked.
• updated deployment and development setup docs
• added openstreetmaps OAuth2 information
• database volumes and node_modules are now in docker volumes, makes it persist
• added circleci config for deployment to https://tm.naxa.com.np

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[robsavoye]

Can you fix the file conflicts ? Currently docker-compose doesn't build a working image, so still needs a few more improvements.

[mahesh-naxa]

Closed as this is handled on PR: https://github.com/hotosm/tasking-manager/pull/6263