Adding demo files

demo/demo.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"github.com/ivahaev/go-xlsx-templater"
+)
+
+func main() {
+	doc := xlst.New()
+	doc.ReadTemplate("./template.xlsx")
+	ctx := map[string]interface{}{
+		"name":           "Github User",
+		"nameHeader":     "Item name",
+		"quantityHeader": "Quantity",
+		"items": []map[string]interface{}{
+			{
+				"name":     "Pen",
+				"quantity": 2,
+			},
+			{
+				"name":     "Pencil",
+				"quantity": 1,
+			},
+			{
+				"name":     "Condom",
+				"quantity": 12,
+			},
+			{
+				"name":     "Beer",
+				"quantity": 24,
+			},
+		},
+	}
+	err := doc.Render(ctx)
+	if err != nil {
+		panic(err)
+	}
+	err = doc.Save("./report.xlsx")
+	if err != nil {
+		panic(err)
+	}
+}