Merge pull request #6742 from wordpress-mobile/try/limit-sockets-npm

Try --maxsockets flag to limit ECONNRESET failures

.buildkite/commands/install-node-dependencies.sh

@@ -28,7 +28,18 @@ if [[ "${RESTORE_ONLY}" ==  'true' ]]; then
 fi
 
 echo "--- :npm: Install Node dependencies"
-npm ci --unsafe-perm --prefer-offline --no-audit --no-progress "$@"
+
+MAX_SOCKETS=15 # Default value from npm
+
+# To avoid constant ECONNRESET errors a limit is set for Linux,
+# as this is not happening with the Mac jobs.
+# This issue is being tracked here:
+# https://github.com/npm/cli/issues/4652
+if [ "$PLATFORM" = "Linux" ]; then
+  MAX_SOCKETS=1
+fi
+
+npm ci --unsafe-perm --prefer-offline --no-audit --no-progress --maxsockets "$MAX_SOCKETS" "$@"
 
 echo "--- :npm: Save cache if necessary"
 # Notice that we don't cache the local node_modules.