Retry a failed connection when using Node.js

Retry failed connections when connecting to Cloud SQL for PostgreSQL by using the Node.js knex module.

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Code sample

Node.js

// 'knex' uses a built-in retry strategy which does not implement backoff.
// 'createRetryIntervalMillis' is how long to idle after failed connection creation before trying again
config.createRetryIntervalMillis = 200; // 0.2 seconds

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