Building Microservices API in Go - Application Configuration

The video tutorial explains how to use environment variables for application configuration, emphasizing the importance of not hardcoding values. It covers defining and injecting variables in Linux, retrieving them using the OS package, and configuring database settings. A sanity check is implemented to ensure all necessary variables are defined, preventing application crashes. The tutorial also discusses exporting variables to simplify command line usage and concludes with a recap and preview of the next video on creating a POST API.

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