fix: Dockerfile.test to reduce vulnerabilities (#170)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-UPSTREAM-NODE-3035792
- https://snyk.io/vuln/SNYK-UPSTREAM-NODE-3035795
- https://snyk.io/vuln/SNYK-UPSTREAM-NODE-3092932
- https://snyk.io/vuln/SNYK-UPSTREAM-NODE-3092933
- https://snyk.io/vuln/SNYK-UPSTREAM-NODE-3105822

Dockerfile.test

@@ -1,4 +1,4 @@
-FROM node:18.8-alpine3.16
+FROM node:18.13-alpine3.16
 
 WORKDIR /code