fix(docker): revert to node:20-slim with 3GB memory

- Use node:20-slim for builder stage (better memory handling)

- Keep node:20-alpine for runtime (smaller image)

- Increase memory to 3072MB for build

Dockerfile

@@ -1,5 +1,5 @@
-# Multi-stage build with memory optimization
-FROM node:20-alpine AS builder
+# Multi-stage build - using slim for better compatibility
+FROM node:20-slim AS builder
 WORKDIR /app
 
 # Skip browser downloads
@@ -7,22 +7,22 @@ ENV PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD=1
 ENV CYPRESS_INSTALL_BINARY=0
 
 # Install build dependencies
-RUN apk add --no-cache python3 make g++
+RUN apt-get update && apt-get install -y python3 make g++ git && rm -rf /var/lib/apt/lists/*
 
 # Copy package files
 COPY package*.json ./
 
-# Install dependencies with reduced memory
+# Install dependencies
 RUN npm install --legacy-peer-deps --prefer-offline --no-audit
 
 # Copy source
 COPY . .
 
-# Build with memory optimization (reduced from 4096 to 2048 for Alpine)
-ENV NODE_OPTIONS="--max-old-space-size=2048"
+# Build with memory optimization (3GB for slim image)
+ENV NODE_OPTIONS="--max-old-space-size=3072"
 RUN npm run build
 
-# Runtime stage
+# Runtime stage - use alpine for smaller size
 FROM node:20-alpine
 WORKDIR /app