fix(frappe-nginx): Generate Standard Style CSS

use nunjucks to render jinja2 template
generate default theme

build/frappe-nginx/generate_standard_style_css.js

@@ -0,0 +1,14 @@
+const nunjucks = require("nunjucks");
+
+const templatePath = process.argv[2];
+const pathArray = templatePath.split("/");
+const templateFile = pathArray.pop();
+const templateDir = pathArray.join("/");
+
+nunjucks.configure(templateDir);
+const rendered = nunjucks.render(templateFile, {
+    button_rounded_corners: true,
+    font_properties: "300,600",
+});
+
+console.log(rendered.replace(/\n/gm, "\\n"));