I have been using Ktor, PostgreSQL, and Jetbrains Exposed for a backend in a hobby project. I was adding a new feature that required making changes to the database, so after a quick Google search found a Stackoverflow answer recommending using Flyway to manage the database migrations. I was looking for a more complete solution to this answer, so ended up creating a sample project to share my learnings in migrating a Postgres database with Flyway in a Ktor project.
With the release of Ktor 2.0, one of the migrations I had to do was for Firebase Authentication which I first learned about how to use with Ktor 1.6 from this medium article last year. Learn how to setup Firebase Authentication with Ktor 2.0 and how to test it.
One day at my day job, I noticed that there were a couple of services we used that anytime an event happened there was a very manual process for the developer to copy paste data into a Slack channel for others to be aware of the issue. I thought there had to be a better way to automate this whole process and prevent a developer from having to do this tedious task. That was when I came up with the idea of creating a Slackbot application to do this. So in this article I will describe the process I went through to create a Slackbot using Ktor and webhooks that can post messages to your Slack channel of choice and how to deploy to Heroku. For this example, we will be using Github webhooks to supply data to our Slackbot but the same principal applies to your service of choice that offers webhooks.