chore: update dockerfile

.ci/docker/node-playwright/Dockerfile

@@ -1,17 +1,4 @@
-#Dockerfile for docker.elastic.co/observability-ci/node-playwright:${NODEJS_VERSION}
-# When changing Node version, please build the Docker image for RUM here:
-#   https://apm-ci.elastic.co/job/apm-shared/job/apm-docker-images-pipeline/build?delay=0sec
-# Remember checking the 'rum' parameter
-# Little bit customized version of microsoft/playwright:bionic image
-ARG NODEJS_VERSION
-FROM ubuntu:bionic
-# this second declaration is needed because ARG before FROM works differently. See https://docs.docker.com/compose/compose-file/#args
-ARG NODEJS_VERSION
-
-# 1. Install node
-RUN apt-get -qq update && apt-get -qq install -y curl && \
-    curl -sL https://deb.nodesource.com/setup_${NODEJS_VERSION}.x | bash - && \
-    apt-get -qq install -y nodejs
+FROM node:18-alpine
 
 # 2. Install git (used to tag commit in benchmark runner)
 RUN apt-get -qq install -y git --no-install-recommends