chore: fix infinite loop condition in http_fileserver.rc and add file server documentation

examples/http_fileserver.rc

@@ -36,8 +36,8 @@ int main() {
     printf("Example: http://localhost:8080/\n\n");
 
     filename = "README.md";
-    count = 0;
-    while (count < 100) {
+    count = 1;
+    while (count > 0) {
         printf("Waiting for connection %d\n", count + 1);
         client_fd = accept(server_fd);