chore: add initial Docker setup with Dockerfile and docker-compose.yml

.dockerignore

@@ -0,0 +1,11 @@
+node_modules
+.next
+.git
+.gitignore
+Dockerfile*
+docker-compose*
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.env*
+.DS_Store

Dockerfile

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+# Multi-stage Dockerfile for Next.js app (production)
+FROM node:20-alpine AS deps
+WORKDIR /app
+
+# Install dependencies
+COPY package*.json ./
+RUN if [ -f package-lock.json ]; then npm ci; else npm install; fi
+
+# Build stage
+FROM node:20-alpine AS builder
+WORKDIR /app
+ENV NEXT_TELEMETRY_DISABLED=1
+
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+RUN npm run build
+
+# Runtime stage
+FROM node:20-alpine AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+ENV PORT=3001
+
+# Install prod deps only for runtime
+COPY package*.json ./
+RUN if [ -f package-lock.json ]; then npm ci --omit=dev; else npm install --omit=dev; fi
+
+# Copy build artifacts
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/next.config.* ./
+
+EXPOSE 3001
+CMD ["npm", "start"]

docker-compose.yml

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+version: "3.9"
+
+services:
+  frontend:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: ibank-frontend:latest
+    environment:
+      - NODE_ENV=production
+      - PORT=3001
+    ports:
+      - "3001:3001"
+    restart: unless-stopped