chore(config): remove zerolog

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

cmd/config.go

@@ -0,0 +1,18 @@
+package cmd
+
+import "github.com/kelseyhightower/envconfig"
+
+type (
+	// Config provides the system configuration.
+	Config struct {
+		Debug bool `envconfig:"DRONE_DEBUG"`
+		Trace bool `envconfig:"DRONE_TRACE"`
+	}
+)
+
+// fromEnviron returns the settings from the environment.
+func fromEnviron() (Config, error) {
+	cfg := Config{}
+	err := envconfig.Process("", &cfg)
+	return cfg, err
+}