Correctly Configure Docker Node Pinning

Dockerfile

@@ -1,49 +1,48 @@
-FROM ruby:3.3.8-alpine AS builder
+ARG ROOT=/usr/src/app/
 
-RUN apk update && apk upgrade && apk add --update --no-cache \
-  build-base \
-  curl-dev \
-  libffi-dev \
-  yaml-dev \
-  linux-headers \
-  postgresql-dev \
-  tzdata
+# available alpine packages: https://pkgs.alpinelinux.org/packages
 
-ARG RAILS_ROOT=/usr/src/app/
-WORKDIR $RAILS_ROOT
+FROM node:24-alpine AS node-source
 
-COPY Gemfile* $RAILS_ROOT
-RUN bundle install
+FROM ruby:3.3.8-alpine AS build
+  ARG ROOT
+  WORKDIR $ROOT
 
-### BUILD STEP DONE ###
+  RUN apk update && apk upgrade && apk add --update --no-cache \
+    build-base \
+    curl-dev \
+    libffi-dev \
+    yaml-dev \
+    linux-headers \
+    postgresql-dev \
+    tzdata
 
-FROM ruby:3.3.8-alpine
-
-ARG RAILS_ROOT=/usr/src/app/
-
-RUN apk add  --no-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/main/ nodejs=24.13.0-r2 npm
-
-# available: https://pkgs.alpinelinux.org/packages
-RUN apk update && apk upgrade && apk add --update --no-cache \
-  bash \
-  build-base \
-  curl \
-  imagemagick \
-  postgresql-client \
-  tzdata \
-  vim \
-  && rm -rf /var/cache/apk/*
-
-WORKDIR $RAILS_ROOT
+  COPY Gemfile* $ROOT
+  RUN bundle install
 
-COPY . .
-RUN npm install --global npm@latest
-RUN npm install
-RUN npm run build && npm run build:css
-
-COPY --from=builder /usr/local/bundle/ /usr/local/bundle/
-
-EXPOSE 3000
-
-ENTRYPOINT ["./docker-entrypoint.sh"]
-CMD ["bin/rails", "s", "-b", "0.0.0.0"]
+FROM ruby:3.3.8-alpine
+  ARG ROOT
+  WORKDIR $ROOT
+
+  RUN apk update && apk upgrade && apk add --update --no-cache \
+    bash \
+    build-base \
+    curl \
+    imagemagick \
+    postgresql-client \
+    tzdata \
+    vim \
+    && rm -rf /var/cache/apk/*
+
+  COPY . .
+  COPY --from=node-source /usr/local/bin/node /usr/local/bin/node
+  COPY --from=node-source /usr/local/lib/node_modules /usr/local/lib/node_modules
+  RUN ln -s /usr/local/lib/node_modules/npm/bin/npm-cli.js /usr/local/bin/npm
+  RUN npm ci
+
+  COPY --from=build /usr/local/bundle/ /usr/local/bundle/
+
+  EXPOSE 3000
+
+  ENTRYPOINT ["./docker-entrypoint.sh"]
+  CMD ["bin/rails", "s", "-b", "0.0.0.0"]