nats implemented

src/emailnotification/.env

src/emailnotification/Dockerfile

src/emailnotification/main.go

src/emailnotification/model/emailContent.go

src/emailnotification/model/natsResponse.go

src/emailnotification/service/email.go

src/emailnotification/service/nats.go

src/highlanderticketing/.env

src/highlanderticketing/main.go

src/highlanderticketing/model/emailContent.go

src/highlanderticketing/model/natsResponse.go

src/highlanderticketing/service/nats.go