Refactor Dockerfile to simplify COPY commands

Dockerfile

@@ -1,5 +1,4 @@
-FROM node:18-alpine AS runner
-
+FROM node:18-alpine 
 WORKDIR /app
 
 ENV NODE_ENV production
@@ -9,16 +8,16 @@ ENV NODE_ENV production
 RUN addgroup --system --gid 1001 nodejs
 RUN adduser --system --uid 1001 nextjs
 
-COPY --from=builder /app/public ./public
+COPY /app/public ./public
 
 # Set the correct permission for prerender cache
 RUN mkdir .next
 RUN chown nextjs:nodejs .next
 
 # Automatically leverage output traces to reduce image size
 # https://nextjs.org/docs/advanced-features/output-file-tracing
-COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
-COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+COPY --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --chown=nextjs:nodejs /app/.next/static ./.next/static
 
 USER nextjs