feat: add nodejs20 runtime

- runtimes/nodejs20/server.js: HTTP wrapper, exports.handle(event)
- runtimes/nodejs20/Dockerfile: node:20-alpine base image
- naeel/sless-runtime-nodejs20:v0.1.0 pushed to DockerHub
- upload.go: nodejs20 in runtimeBaseImage(), package.json → npm install
- upload.go: python3.11 now uses v0.1.0 tag (no more latest)
- operator v0.1.2 deployed in cluster
- E2E: hello-node-default.fn.kube5s.ru → {"message":"Hello, Naeel! (nodejs20)"}

hello-node/handler.js

@@ -0,0 +1,6 @@
+// handler.js — пример serverless функции на Node.js 20
+// Возвращает приветствие с именем из event или "World" по умолчанию
+exports.handle = async (event) => {
+    const name = event.name || 'World';
+    return { message: `Hello, ${name}! (nodejs20)` };
+};

hello-node/main.tf

@@ -0,0 +1,45 @@
+# 2026-03-07
+# main.tf — e2e тест: hello-world функция на Node.js 20.
+#
+# Использование:
+#   1. terraform init && terraform apply
+#   2. После apply (~2 мин kaniko):
+#        curl -s -X POST <trigger_url> -H 'Content-Type: application/json' -d '{"name":"Naeel"}'
+#   Ожидаемый ответ: {"message":"Hello, Naeel! (nodejs20)"}
+
+terraform {
+  required_providers {
+    sless = {
+      source  = "terra.k8c.ru/naeel/sless"
+      version = "~> 0.1.1"
+    }
+  }
+}
+
+provider "sless" {
+  endpoint = "https://sless-api.kube5s.ru"
+  token    = "dev-token-change-me"
+}
+
+resource "sless_function" "hello_node" {
+  namespace   = "default"
+  name        = "hello-node"
+  runtime     = "nodejs20"
+  entrypoint  = "handler.handle"
+  memory_mb   = 128
+  timeout_sec = 30
+
+  code_path = "${path.module}/handler.zip"
+  code_hash = filemd5("${path.module}/handler.zip")
+}
+
+resource "sless_trigger" "hello_node_http" {
+  namespace = "default"
+  name      = "hello-node-http"
+  type      = "http"
+  function  = sless_function.hello_node.name
+}
+
+output "trigger_url" {
+  value = sless_trigger.hello_node_http.url
+}