Initial bootrap of application

- Creates scaffold for router and server
- Main program set up for environment, OS signal listener
- Makefile generic commands

cmd/api/env.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"github.com/joho/godotenv"
+	"github.com/kelseyhightower/envconfig"
+)
+
+type config struct {
+	Env      string `default:"dev"`
+	APIPort  int    `default:3000`
+	LogLevel string `default:"debug"`
+}
+
+func load() (cfg config, err error) {
+	_ = godotenv.Load("cmd/api/.env")
+	err = envconfig.Process("", &cfg)
+	return
+}