Add pre-built client for low-memory servers

.gitignore

@@ -4,7 +4,6 @@ node_modules/
 *.db
 *.db-shm
 *.db-wal
-client/build/
 .DS_Store
 npm-debug.log*
 yarn-debug.log*
@@ -13,3 +12,4 @@ yarn-error.log*
 .idea/
 deploy-package/
 data/*.db
+# Note: client/build/ is included for low-memory deployments