Add Dockerfile and CI/CD pipeline

Dockerfile

@@ -0,0 +1,28 @@
+FROM node:22-alpine AS base
+
+# Install dependencies
+FROM base AS deps
+WORKDIR /app
+COPY package.json package-lock.json* ./
+RUN npm ci
+
+# Build the application
+FROM base AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+RUN npm run build
+
+# Production image
+FROM base AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+COPY --from=builder /app/public ./public
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+USER nextjs
+EXPOSE 3000
+ENV PORT=3000
+CMD ["node", "server.js"]