Update Node.js to v21.7

Dockerfile

-FROM --platform=$BUILDPLATFORM public.ecr.aws/docker/library/node:21.6-alpine@sha256:f5d3a6aea1b1d35066e6c034f5c264cd5b051fc7c7cb0160bb88899e7b1f0c83 AS buildJS
+FROM --platform=$BUILDPLATFORM public.ecr.aws/docker/library/node:21.7-alpine@sha256:ed4880bea0d76e280073698d18ebd056e792cabc40ab3184c006edb22db8ffe7 AS buildJS
 WORKDIR /app
 COPY . ./
 RUN yarn install --frozen-lockfile && \