chore: Update Dockerfile base images, add system updates, and change exposed port to 8080.

Dockerfile

@@ -1,5 +1,6 @@
 # Estágio de Build
-FROM node:20-alpine as build-stage
+FROM bitnami/node:22 as build-stage
+RUN apt-get update && apt-get upgrade -y && apt-get clean && rm -rf /var/lib/apt/lists/*
 WORKDIR /app
 COPY package*.json ./
 RUN npm install --frozen-lockfile || npm install
@@ -7,7 +8,8 @@ COPY . .
 RUN npm run build
 
 # Estágio de Produção
-FROM nginx:stable-alpine as production-stage
+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 80
+EXPOSE 8080
 CMD ["nginx", "-g", "daemon off;"]