take fonts path from path to template

src/invoice_generator/html_generator.py

@@ -13,6 +13,7 @@ class HtmlTemplate:
         if not Path(templates).exists():
             raise FileNotFoundError(f'Inivalid path to template files: {templates}')
         self.templates = templates
+        self.path_to_template = Path(templates)
 
     def prepare_template(self, invoice_data, envelope_data):
         try:
@@ -53,15 +54,14 @@ class HtmlTemplate:
         html_content = markdown.markdown(md_content)
         return html_content
 
-    @staticmethod
-    def convert_html_to_pdf(source_html, output_filename):
+    def convert_html_to_pdf(self, source_html, output_filename):
         # open output file for writing (truncated binary)
         result_file = open(output_filename, "w+b")
 
         # convert HTML to PDF
         pisa_status = pisa.CreatePDF(
             source_html,  # the HTML to convert
-            path='test_data/templates/fonts',
+            path=str(self.path_to_template / 'fonts'),
             dest=result_file
         )  # file handle to recieve result