chore: add Dockerfile for containerized deployment

Author: edycutjong

Dockerfile

@@ -0,0 +1,26 @@
+# Dockerfile for PaciPort
+FROM node:20-alpine AS base
+
+# Install dependencies
+FROM base AS deps
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci --production=false
+
+# Build
+FROM base AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+RUN npm run build
+
+# Production
+FROM base AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+COPY --from=builder /app/.next/standalone ./
+COPY --from=builder /app/.next/static ./.next/static
+COPY --from=builder /app/public ./public
+
+EXPOSE 3000
+CMD ["node", "server.js"]