fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE320-OPENSSL-7413532
- https://snyk.io/vuln/SNYK-ALPINE320-OPENSSL-7413532

Dockerfile

@@ -1,6 +1,6 @@
 
 # Use an official node image
-FROM node:lts-alpine
+FROM node:20.15.1-alpine3.20
 
 RUN set -xe \
     && apk add --no-cache bash git openssh \