feat: frontend alumnos sam-pruebas (RUT+clave, rendir y mis resultados)

frontend/Dockerfile

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+FROM node:22-alpine AS base
+
+FROM base AS deps
+WORKDIR /app
+COPY package.json package-lock.json* ./
+RUN npm ci || npm install
+
+FROM base AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+ENV NEXT_TELEMETRY_DISABLED=1
+ARG NEXT_PUBLIC_API_URL=https://api.devops.norteamericano.cl
+ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL
+RUN npm run build
+
+FROM base AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+RUN addgroup --system --gid 1001 nodejs && 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"]