rewrite dockerfile to be multi-stage

Dockerfile

@@ -1,28 +1,29 @@
-FROM node:lts-slim as runtime
+FROM node:lts AS base
 WORKDIR /app
 
-# Ensure that both node_modules and package-lock.json are removed.
-COPY package.json .
-RUN rm -rf node_modules
+COPY package.json package-lock.json ./
 
-# Perform a fresh installation of npm dependencies.
-RUN npm install
+FROM base AS prod-deps
+RUN npm ci --omit=dev
+
+FROM base AS build-deps
+RUN npm ci
+
+FROM build-deps AS build
 
-# Copy the rest of your application files.
 COPY . .
 
 ARG POCKETBASE_URL
-ARG PORT=4321
-# Set environment variables and expose the appropriate port.
-ENV HOST=0.0.0.0
-ENV PORT=${PORT}
 ENV POCKETBASE_URL=${POCKETBASE_URL}
 
-# Build your application.
 RUN npm run build
 
+FROM base AS runtime
+COPY --from=prod-deps /app/node_modules ./node_modules
+COPY --from=build /app/dist ./dist
 
+ARG PORT=4321
+ENV HOST=0.0.0.0
+ENV PORT=${PORT}
 EXPOSE ${PORT}
-
-# Define the command to run your application.
 CMD node ./dist/server/entry.mjs