examples: fullstack vweb example (#16761)

examples/vweb_fullstack/src/main.v

@@ -0,0 +1,40 @@
+module main
+
+import vweb
+import databases
+import os
+
+const (
+	port = 8082
+)
+
+struct App {
+	vweb.Context
+}
+
+pub fn (app App) before_request() {
+	println('[web] before_request: ${app.req.method} ${app.req.url}')
+}
+
+fn main() {
+	mut db := databases.create_db_connection() or { panic(err) }
+
+	sql db {
+		create table User
+	} or { panic('error on create table: ${err}') }
+
+	db.close() or { panic(err) }
+
+	mut app := &App{}
+	app.serve_static('/favicon.ico', 'src/assets/favicon.ico')
+	// makes all static files available.
+	app.mount_static_folder_at(os.resource_abs_path('.'), '/')
+
+	vweb.run(app, port)
+}
+
+pub fn (mut app App) index() vweb.Result {
+	title := 'vweb app'
+
+	return $vweb.html()
+}