fix: correct Dockerfile paths and add comments for clarity

Dockerfile

@@ -1,3 +1,4 @@
+# Estágio 1: Build (Node 16 Bullseye)
 FROM node:16-bullseye-slim AS builder
 WORKDIR /app
 COPY package*.json ./
@@ -6,7 +7,8 @@ COPY . .
 RUN npm run build -- --prod
 
 FROM nginx:alpine
-RUN apk add --no-cache gettext # Para o envsubst funcionar
-COPY --from=builder /app/dist/seu-projeto /usr/share/nginx/html
+RUN apk add --no-cache gettext 
+
+COPY --from=builder /app/dist/sales /usr/share/nginx/html
 
 CMD ["/bin/sh", "-c", "envsubst < /usr/share/nginx/html/assets/env.template.js > /usr/share/nginx/html/assets/env.js && exec nginx -g 'daemon off;'"]