Add Parseable transport (#2466)

Author: nitisht

docs/transports.md

@@ -51,6 +51,7 @@ there are additional transports written by
   * [MySQL](#mysql-transport)
   * [New Relic](#new-relic-agent-transport)
   * [Papertrail](#papertrail-transport)
+  * [Parseable](#parseable)
   * [PostgresQL](#postgresql-transport)
   * [Pusher](#pusher-transport)
   * [Sentry](#sentry-transport)
@@ -732,6 +733,33 @@ The Papertrail transport connects to a [PapertrailApp log destination](https://p
 
 *Metadata:* Logged as a native JSON object to the 'meta' attribute of the item.
 
+### Parseable Transport
+
+[Parseable](https://parseable.com/) is an open source, general purpose log analytics system. [Parseable-Winston](https://github.com/jybleau/parseable-node-loggers/tree/main/packages/winston#parseable-winston) is a Parseable transport for Winston.  
+
+```js
+// Using cjs
+const { ParseableTransport } = require('parseable-winston')
+const winston = require('winston')
+
+const parseable = new ParseableTransport({
+  url: process.env.PARSEABLE_LOGS_URL, // Ex: 'https://parsable.myserver.local/api/v1/logstream'
+  username: process.env.PARSEABLE_LOGS_USERNAME,
+  password: process.env.PARSEABLE_LOGS_PASSWORD,
+  logstream: process.env.PARSEABLE_LOGS_LOGSTREAM, // The logstream name
+  tags: { tag1: 'tagValue' } // optional tags to be added with each ingestion
+})
+
+const logger = winston.createLogger({
+  levels: winston.config.syslog.levels,
+  transports: [parseable],
+  defaultMeta: { instance: 'app', hostname: 'app1' }
+})
+
+logger.info('User took the goggles', { userid: 1, user: { name: 'Rainier Wolfcastle' } })
+logger.warning('The goggles do nothing', { userid: 1 })
+```
+
 ### PostgresQL Transport
 
 [@pauleliet/winston-pg-native](https://github.com/petpano/winston-pg-native) is a PostgresQL transport supporting Winston 3.X.