Golang application for kubernetes

I want to develop a Golang application for Kubernetes (cloud-native). So, I have a question about application architecture for DevOps.

First, need to say a little bit of information about the application. The application is a usual rest API server that uses cron commands and workers. In the feature, I will deploy the rest API server and workers via Kubernetes Deployment, for cron commands will use CronJob. However, I didn't decide how to build docker images for deploying my application.

So, about problems:

In my project, a have hext applications:

/cmd/
|---/api/
    |--- main.go
|---/cron
    |--- main.go
|---/worker
    |--- main.go

I will develop worker and cron as command-line application using package flag.

Database migrations

I think that need to build other Docker image for migration only. For example with using base image migrate/migrate.

Running commands / workers

I will develop cron and worker as console commands that need to run in Kubernetes as commands in Docker containers like this.

Running the Rest-API server

I will run rest API server in scratch container like this:

FROM scratch

COPY --from=Builder /main /

EXPOSE 8080

CMD ["/main"]

So, when I use this decision need to build 3 Docker containers. It's okay?

One of the best decisions it adds all applications in one Docker container and executes applications as a command line.

But, I like it when in the Docker image exists only one application with dependencies.

What do you think about it?