docker: add @types/node in builder for tsc server build

Dockerfile

@@ -15,6 +15,9 @@ COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
 RUN pnpm install --frozen-lockfile --ignore-scripts=false --enable-pre-post-scripts \
   && pnpm rebuild bcrypt --build-from-source || true
 
+# Ensure Node types are available for server build
+RUN pnpm add -D @types/node@^22
+
 # Copy only server sources and tsconfig for server build
 COPY src/server ./src/server
 COPY tsconfig.server.json ./tsconfig.server.json