use bun insted of npm

frontend/dockerfile

@@ -1,13 +1,16 @@
-FROM node:20-alpine as build-stage
+FROM oven/bun:1 AS build-stage
 WORKDIR /app
-COPY package*.json ./
-RUN npm install --force
-COPY . .
-RUN npm run build
 
-FROM node:20-alpine as production-stage
+# Limit memory for Node processes (3 GB)
+
+COPY package.json bun.lockb* ./
+RUN bun install --frozen-lockfile
+COPY . .
+RUN bun run build
+
+FROM oven/bun:1 AS production-stage
 WORKDIR /app
 COPY --from=build-stage /app /app
 EXPOSE 3000
 ENV NODE_ENV=production
-CMD ["npm", "run", "start"]
+CMD ["bun", "run", "start"]