Option to disable jest-mongodb and use real database

[piranna]

Add and option to disable jest-mongodb and use real database, so it's possible to use the same tests both in local and/or unit tests, and for a real deployment like integration tests.

Implementation would be easy, just a matter creating the MongodbMemoryServer instance inside

jest-mongodb/setup.js

Line 11 in ea02ede

module.exports = async () => {

after checking for a condition, and later check on

jest-mongodb/teardown.js

Line 3 in ea02ede

module.exports = async function () {

if global.__MONGOD__ has been set... Problem is what condition to use. Obvious one would be an environment variable, like if process.env.MONGO_URL is already set, but maybe overwritting it by jest-mongodb could be a valid use case, for example if it's already set in a .env file... Maybe a DISABLE_JEST_MONGODB environment variable?