Restructure project similar to hello and graph

pkg/config/config.go

@@ -0,0 +1,44 @@
+package config
+
+// Log defines the available logging configuration.
+type Log struct {
+	Level  string
+	Pretty bool
+	Color  bool
+}
+
+// Debug defines the available debug configuration.
+type Debug struct {
+	Addr   string
+	Token  string
+	Pprof  bool
+	Zpages bool
+}
+
+// HTTP defines the available http configuration.
+type HTTP struct {
+	Addr string
+}
+
+// Tracing defines the available tracing configuration.
+type Tracing struct {
+	Enabled   bool
+	Type      string
+	Endpoint  string
+	Collector string
+	Service   string
+}
+
+// Config combines all available configuration parts.
+type Config struct {
+	File    string
+	Log     Log
+	Debug   Debug
+	HTTP    HTTP
+	Tracing Tracing
+}
+
+// New initializes a new configuration with or without defaults.
+func New() *Config {
+	return &Config{}
+}