Use env vars to send logs to loggly

[cheran-senthil]

Description

This PR allows logs to be directly sent from the Dockerfile of Discovery and Creator Nodes.

This also adds an env var to control this behavior

Tests

Testing on Sandbox nodes

How will this change be monitored?

[gitguardian]

⚠️ GitGuardian has uncovered 1 secret following the scan of your pull request.

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Secret	Commit	Filename	Detected At
Generic High Entropy Secret	7035aa2	libs/scripts/communityRewards/transferCommunityRewardsToSolana.js	15:11 December 8th, 2021	View secret

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