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

@@ -1,12 +1,12 @@
 # syntax=docker/dockerfile:1
-FROM node:lts-alpine AS builder
+FROM node:20.15.1-alpine3.20 AS builder
 WORKDIR /usr/app
 COPY package*.json ./
 RUN npm ci --ignore-scripts
 COPY . .
 RUN npm run build && npm run pack && npm run copy-other-required-files
 
-FROM node:lts-alpine
+FROM node:20.15.1-alpine3.20
 USER node
 WORKDIR /usr/app
 COPY --chown=node:node --from=builder /usr/app/dist /usr/app/src/schema.sql ./