add readme

internal/cli.go

@@ -2,6 +2,6 @@ package internal
 
 type CLI struct {
 	File string `arg:"" name:"file" short:"f" help:"Path to CSV redirects file." type:"path"`
-	Host string `name:"host" help:"HTTP listen host." default:"${host}"`
-	Port string `name:"port" short:"p" help:"HTTP listen port." default:"${port}"`
+	Host string `name:"host" help:"HTTP listen host." default:"localhost"`
+	Port string `name:"port" short:"p" help:"HTTP listen port." default:"4000"`
 }

internal/csv.go

@@ -41,7 +41,9 @@ func ReadCsvRedirects(file string) (Redirects, error) {
 		return nil, errors.New("CSV must contain From, To, and Status Code headings")
 	}
 
+	// Read data
 	redirects := Redirects{}
+
 	for {
 		row, err := csvReader.Read()
 		if err != nil {