Merge pull request #372 from hedgedoc/renovate/node-16.18.0-alpine

Update Node.js to f16544b

alpine/Dockerfile

-FROM node:16.18.0-alpine@sha256:842770ef089fcb7c3bc40fcbf2b1f80fd2361558d4950f03f24444767265e613 AS base
+FROM node:16.18.0-alpine@sha256:f16544bc93cf1a36d213c8e2efecf682e9f4df28429a629a37aaf38ecfc25cf4 AS base
 
 FROM base AS builder
 # Build arguments to change source url, branch or tag