fix(dockerfile): remove migrator stage that was overriding default CMD to payload migrate

Dockerfile

@@ -64,18 +64,3 @@ COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
 COPY --from=builder --chown=nextjs:nodejs /app/.next/cache ./.next/cache
 
 CMD ["node", "server.js"]
-
-# ──────────────────────────────────────────────────────────────────────────────
-# Stage: Migrator — used by CI to run "payload migrate" against the live DB.
-# Retains node_modules so the payload CLI is available.
-# ──────────────────────────────────────────────────────────────────────────────
-FROM node:20-alpine AS migrator
-WORKDIR /app
-ENV NODE_ENV=production
-
-COPY --from=builder /app/package.json ./package.json
-COPY --from=builder /app/node_modules ./node_modules
-COPY --from=builder /app/src/migrations ./src/migrations
-COPY --from=builder /app/payload.config.ts ./payload.config.ts
-
-CMD ["node", "node_modules/.bin/payload", "migrate"]