docs(server): SQL SSL docs update on using ssl with no custom cert

[metalix2]

Found out that when using certificates defined else where you need to specify in the sqlDialectOptions that ssl is true.

Related thread - sequelize/sequelize#956 (comment)

Just felt it should be noted in the docs.

I suppose the alternative is to bind sqlConnectionSsl: true to map to

dialectOptions: {
  ssl: true,
}

Without this the API returns:

SequelizeConnectionError: no pg_hba.conf entry for host "172.18.48.124", user "lighthouseci", database "lighthouseci", SSL off
    at /usr/src/lhci/node_modules/sequelize/lib/dialects/postgres/connection-manager.js:154:24
    at Connection.connectingErrorHandler (/usr/src/lhci/node_modules/pg/lib/client.js:194:14)
    at Connection.emit (events.js:315:20)
    at Socket.<anonymous> (/usr/src/lhci/node_modules/pg/lib/connection.js:134:12)
    at Socket.emit (events.js:315:20)
    at addChunk (_stream_readable.js:295:12)
    at readableAddChunk (_stream_readable.js:271:9)
    at Socket.Readable.push (_stream_readable.js:212:10)
    at TCP.onStreamRead (internal/stream_base_commons.js:186:23)

[patrickhulce]

thanks @metalix2!