fix: 兼容 BuildKit 的纯 ASCII 构建上下文规则

.dockerignore

@@ -1,14 +1,24 @@
-node_modules
-.nuxt
-.output
-.git
-.DS_Store
-data/db/*
-data/media/*
-素材库
-docs
-*.log
-.env*
+# Build context allowlist. Keep this file ASCII-only for BuildKit compatibility.
+**
+
+!Dockerfile
+!package.json
+!package-lock.json
+!nuxt.config.ts
+!tsconfig.json
+
+!app/
+!app/**
+!server/
+!server/**
+!public/
+!public/**
+!scripts/
+!scripts/**
+!content/
+!content/**
+
+# Local-only source masters are not required by the production image.
 public/images/hero-bg-v3-master.png
 public/images/brand-logo-source.png
 public/images/hero-bg-v1.png