Local Development Essentials Testing E-Mail Sending Feature Mailpit is a small, fast, low memory, zero-dependency, multi-platform email testing tool & API for developers It acts as an SMTP server, provides a modern web interface to view & test captured emails, and includes an API for automated integration testing Docker with Springboot really useful for local development Rest API really helpful for integration testing Testing MongoDB documents MongoDB docker image helps to run docker container for local development MongoDB Express is one of the best tool to visualise MongoDB content, and it's really helpful for local development to add/update/remove data from/to MongoDB