bump node version + pin pnpm version

Author: BassemHalim

client/Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker.io/docker/dockerfile:1
 
-FROM node:18-alpine AS base
+FROM node:20-alpine AS base
 
 # Step 1. Rebuild the source code only when needed
 FROM base AS builder

client/package.json

@@ -58,6 +58,7 @@
         "typescript": "^5",
         "typescript-eslint": "^8.32.1"
     },
+    "packageManager": "pnpm@10.33.0",
     "pnpm": {
         "overrides": {
             "js-yaml@>=4.0.0 <4.1.1": ">=4.1.1",