Wrong Log message if DB_URL is not set

[paulo-ocean]

On Index.ts
Right at the beginning, when we check for DB configuration
The log is wrongly placed (it prints when DB_URL is set, while it should be the opposite):

OCEAN_NODE_LOGGER.warn(
    `Missing or invalid property: "${ENVIRONMENT_VARIABLES.DB_URL.name}". This means Indexer module will not be enabled.`
  )