fix: project/c2-microservices-v1/udacity-c2-restapi-user/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-UPSTREAM-NODE-8651420
- https://snyk.io/vuln/SNYK-DEBIAN12-GNUTLS28-8705121
- https://snyk.io/vuln/SNYK-DEBIAN12-LIBTASN16-8689970
- https://snyk.io/vuln/SNYK-UPSTREAM-NODE-8670156
- https://snyk.io/vuln/SNYK-DEBIAN12-ZLIB-6008963

Author: snyk-bot

project/c2-microservices-v1/udacity-c2-restapi-user/Dockerfile

@@ -1,5 +1,5 @@
 # Set the base image
-FROM node:18.20.3-slim
+FROM node:18.20.7-slim
 # Create app directory
 WORKDIR /usr/src/app
 # Copy package.json AND package-lock.json