Send email endpoint

[andreformento]

closes #23

@jvanz @giuliocc

Changes

• create a new endpoint for suggestions POST /suggestions
• now application need to have another environment variable, like you can see on config/sample.env file
• you need to create a token at Mailjet to run application and send email (put on config/current.env)

Test

• Make a POST request

curl -X POST -vv "http://localhost:8080/suggestions" -H  "accept: application/json" -H  "Content-Type: application/json" -d '{
    "email_address": "[email protected]",
    "name": "My Name",
    "content": "Suggestion content"
}'

• status code response need to be 200 OK
• body response need to be

{ "status": "sent" }

[ogecece]

I'm setting up the environment to take a look at this

[ogecece]

As we discussed, we found it better to maintain #33 open and remove the remote elasticsearch features from this PR.

[ogecece]

Thanks for the modifications! Now I could focus on some aspects that I couldn't before, I think these should be my final requests :)

[jvanz]

Have you test this PR with actual Mailjet credentials?

[andreformento]

Have you test this PR with actual Mailjet credentials?

Yes, I created a new account (personal) and tested. Do you want some help to do that?

[ogecece]

Tested it. Everything is working fine! LGTM

@jvanz do you have anything to add?