feat: 按历史痕迹恢复 nginx 同域入口

frontend/Caddyfile

@@ -1,5 +0,0 @@
-:4173
-
-root * /srv
-try_files {path} /index.html
-file_server

frontend/Dockerfile

@@ -2,18 +2,14 @@ FROM node:20-alpine AS build
 
 WORKDIR /app
 
-ARG VITE_API_BASE_URL
-ENV VITE_API_BASE_URL=${VITE_API_BASE_URL}
-
 COPY package*.json ./
 RUN npm ci
 
 COPY . .
 RUN npm run build
 
-FROM caddy:2-alpine
+FROM alpine:3.21
 
-COPY Caddyfile /etc/caddy/Caddyfile
-COPY --from=build /app/dist /srv
+WORKDIR /opt/frontend
 
-EXPOSE 4173
+COPY --from=build /app/dist ./dist