Add inbucket docker image to allow local and automated testing of emails (#4901)

* add docker container for inbucket

* Add way to get the emails using inbucket and add a test for reset password

* add config setting to send emails

* update TestEmailTest

update

* add another test and fix wrong assert

* update per review

fix lint

change senders email

* Revert config.json to default values for EmailSettings section

* update test

* add setup to make the test run

config/config.json

@@ -109,15 +109,15 @@
         "EnableSignUpWithEmail": true,
         "EnableSignInWithEmail": true,
         "EnableSignInWithUsername": true,
-        "SendEmailNotifications": false,
+        "SendEmailNotifications": true,
         "RequireEmailVerification": false,
         "FeedbackName": "",
-        "FeedbackEmail": "",
+        "FeedbackEmail": "test@example.com",
         "FeedbackOrganization": "",
         "SMTPUsername": "",
         "SMTPPassword": "",
-        "SMTPServer": "",
-        "SMTPPort": "",
+        "SMTPServer": "dockerhost",
+        "SMTPPort": "2500",
         "ConnectionSecurity": "",
         "InviteSalt": "",
         "PasswordResetSalt": "",