feat: custom template

pkg/invoice/report/template.go

@@ -9,9 +9,6 @@ import (
 	"time"
 )
 
-//go:embed assets/template.html
-var htmlTemplate string
-
 //go:embed assets/style.css
 var style template.CSS
 
@@ -33,7 +30,7 @@ func (r Report) ToHTML() (html string, err error) {
 			"time":     fmtDateTime,
 			"date":     fmtDate,
 			"duration": fmtDuration,
-		}).Parse(htmlTemplate))
+		}).Parse(r.template))
 
 	buf := new(bytes.Buffer)