minor dockerfile updates (#23826)

Author: mikesurowiec

Dockerfile

@@ -17,8 +17,8 @@ WORKDIR /usr/src/docs
 # ---------------
 FROM base as all_deps
 
-COPY package*.json ./
 COPY .npmrc ./
+COPY package*.json ./
 
 RUN npm ci
 
@@ -36,14 +36,12 @@ RUN npm prune --production
 # ---------------
 FROM all_deps as builder
 
-ENV NODE_ENV production
-
 COPY stylesheets ./stylesheets
 COPY pages ./pages
 COPY components ./components
 COPY lib ./lib
 
-# one part of the build relies on this content file to pull all-products
+# One part of the build relies on this content file to pull all-products
 COPY content/index.md ./content/index.md
 
 COPY next.config.js ./next.config.js
@@ -76,24 +74,27 @@ COPY --chown=node:node --from=builder /usr/src/docs/.next /usr/src/docs/.next
 # We should always be running in production mode
 ENV NODE_ENV production
 
-# Hide iframes, add warnings to external links
-ENV AIRGAP true
+# Whether to hide iframes, add warnings to external links
+ENV AIRGAP false
+
+# By default we typically don't want to run in clustered mode
+ENV WEB_CONCURRENCY 1
+
+# This makes sure server.mjs always picks up the preferred port
+ENV PORT 4000
 
 # Copy only what's needed to run the server
 COPY --chown=node:node assets ./assets
-COPY --chown=node:node content ./content
-COPY --chown=node:node data ./data
 COPY --chown=node:node includes ./includes
+COPY --chown=node:node translations ./translations
+COPY --chown=node:node content ./content
 COPY --chown=node:node lib ./lib
 COPY --chown=node:node middleware ./middleware
-COPY --chown=node:node translations ./translations
-COPY --chown=node:node server.mjs ./server.mjs
-COPY --chown=node:node package*.json ./
 COPY --chown=node:node feature-flags.json ./
+COPY --chown=node:node data ./data
 COPY --chown=node:node next.config.js ./
+COPY --chown=node:node server.mjs ./server.mjs
 
-# This makes sure server.mjs always picks up the preferred port
-ENV PORT=4000
 EXPOSE $PORT
 
 CMD ["node", "server.mjs"]