Initialize config default values on app start

frontend/config/config.go

@@ -1,5 +1,13 @@
 package config
 
+import (
+	"strings"
+
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
+)
+
 // Content contains content-specific configuration
 type Content struct {
 	Backend      string `mapstructure:"backend"`
@@ -16,3 +24,31 @@ type Config struct {
 	Unix    string  `mapstructure:"unix"`
 	Content Content `mapstructure:"content"`
 }
+
+// initialize default values on app-start
+func init() {
+
+	pflag.BoolP("version", "V", false, "get application version")
+	pflag.BoolP("verbose", "v", false, "enable verbose logging")
+	pflag.StringP("config", "c", string("frontend.yaml"), "config file path")
+
+	pflag.String("addr", "127.0.0.1:8000", "tcp addr to listen")
+	pflag.String("unix", "", "unix socket path to listen")
+	pflag.String("base", "", "http URI prefix")
+
+	pflag.String("content.backend", "demo.ghost.io:443", "ghost backend addr")
+	pflag.String("content.key", "22444f78447824223cefc48062", "ghost content api key")
+	pflag.String("content.pinned", "contact", "pinned page slug")
+	pflag.Int("content.postsPerPage", 5, "amount of posts per page")
+
+	pflag.Parse()
+
+	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+	viper.AutomaticEnv()
+	viper.BindPFlags(pflag.CommandLine)
+
+	if viper.GetBool("verbose") {
+		logrus.SetLevel(logrus.DebugLevel)
+		logrus.Debug("Verbose mode")
+	}
+}

go.mod

@@ -1,3 +1,9 @@
 module code.tokarch.uk/mainnika/nikita-tokarch-uk
 
 go 1.17
+
+require (
+	github.com/sirupsen/logrus v1.8.1
+	github.com/spf13/pflag v1.0.5
+	github.com/spf13/viper v1.9.0
+)