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Forewords

This repo has some background, let me tell about it. Once, quite some time ago, I came to the company on the interview, for quite good and interesting position. We were talking about what they need and what I will need to do on this position. Meeting it self was good and I was so excited about that position.

But after few days I received tests assignment from them. I was a bit confused, because for that kind of positions there is no test assignment usually. I was busy and working 24/7 in another company and had a business trip for 3 days (two days of the trip were weekend) that week and I told them about it.

Forewords

I needed a way to test mail confirmation. When you are dealing with deb authentication you would like to be sure that this email exist. And usually I use is_email_confirmed column next to user credentials in the database table. Once user hits siging endpoint as last step I send an email with confirmation token.

I was looking on few popular tools across the Internet:

• https://mailtrap.io/
• https://mailcow.email/
• https://mailu.io/1.7/
• https://poste.io/

What I found

My requirements were: run in docker, easy to config, basic functionality to render email. All things above quite heavy apps with complex configuration. After that I found found nice and lightweight way how to test it locally.

Forewords

I was doing hobby project, nothing special, server with authentication few endpoints and connection to database. I wrapped this project in docker to distribute project to another developer, he wanted to help with fronted but not that fluent at the backend part. Then I realized that my friend does not want to struggle with database setup and so on. So, solution was straight forward - docker-compose.

Problem

I prefer using .env instead of typing stuff to cli. I found out really elegant solution. You can still use .env and parse it easily with github.com/caarlos0/env/v6, specify default values or even load file (certificates etc). But in docker-compose you need to specify same ports for database for example. Here comes github.com/joho/godotenv, if you provide environment variables via dockerfile or docker-compose it will override constants in your .env.