Update Dockerfile to use standard node:22-alpine and port 80

Dockerfile

@@ -1,15 +1,14 @@
-# Estágio de Build
-FROM bitnami/node:22 as build-stage
-RUN apt-get update && apt-get upgrade -y && apt-get clean && rm -rf /var/lib/apt/lists/*
+# Build stage
+FROM node:22-alpine AS build
 WORKDIR /app
 COPY package*.json ./
 RUN npm install --frozen-lockfile || npm install
 COPY . .
 RUN npm run build
 
-# Estágio de Produção
-FROM nginxinc/nginx-unprivileged:alpine as production-stage
-RUN apk update && apk upgrade --no-cache
-COPY --from=build-stage /app/dist /usr/share/nginx/html
-EXPOSE 8080
+# Production stage
+FROM nginx:alpine
+COPY --from=build /app/dist /usr/share/nginx/html
+# Nginx default listen 80
+EXPOSE 80
 CMD ["nginx", "-g", "daemon off;"]