fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-UPSTREAM-NODE-7430900
- https://snyk.io/vuln/SNYK-UPSTREAM-NODE-7430905
- https://snyk.io/vuln/SNYK-DEBIAN12-ZLIB-6008963
- https://snyk.io/vuln/SNYK-DEBIAN12-GLIBC-8658672
- https://snyk.io/vuln/SNYK-DEBIAN12-GLIBC-8658672

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:20.15.0-bookworm-slim AS base
+FROM node:20.18.2-bookworm-slim AS base
 RUN adduser --disabled-password -home /home/cfu -shell /bin/bash cfu
 WORKDIR /root/cf-runtime
 COPY package.json yarn.lock ./