update frontend dockerfile

frontend/Dockerfile

@@ -1,6 +1,5 @@
-FROM docker.io/library/node:16-alpine as builder
+FROM docker.io/library/node:16.15-bullseye-slim as builder
 WORKDIR /frontend
-RUN npm install -g npm
 COPY ./package.json ./package.json
 COPY ./package-lock.json ./package-lock.json
 RUN npm install