Before proceeding with the setup, ensure that the following prerequisites are met:

• You have a MongoDB database running locally or on atlas
• You have Golang installed on your machine

The following environment variables are required to run the server:

• PORT
• MONGO_URI - the database connection string
• DEFAULT_DB - the database name
• INFURA_KEY - the infura key for interacting with the ethereum blockchain, you can get one from here

once all the environment variables are added to .env file, you can run the server by running the following commands:

$ go mod download
$ go run main.go

This will start the server on the port specified in the .env file. You can now make requests to the API using tools like cURL or Postman.