Initial plugin setup and configuration

[jkirkpatrick24]

Connect nodemailer to mailgun

• install fastify-nodemailer
• install mailgun transport
• configure fastify-nodemailer with the mailgun transport and send test emails to mailgun account

Outcome

• a plugin that receives some configuration options for nodemailer (and eventually fastify-point-of-view)
• that plugin decorates the fastify instance with a mail context object.
• that context object has a sendMail method that can be invoked to send a test email to mailgun
• does not need to be a configurable email yet

Considerations

• transport (and all nodemailer config) needs to be injectable. Not everyone is going to be using mailgun!