fix: compatible with --base flag

close #835

src/node/build/build.ts

@@ -9,13 +9,18 @@ import { bundle, okMark, failMark } from './bundle'
 
 export async function build(
   root: string,
-  buildOptions: BuildOptions & { mpa?: string } = {}
+  buildOptions: BuildOptions & { base?: string; mpa?: string } = {}
 ) {
   const start = Date.now()
 
   process.env.NODE_ENV = 'production'
   const siteConfig = await resolveConfig(root, 'build', 'production')
 
+  if (buildOptions.base != null) {
+    siteConfig.site.base = buildOptions.base
+    delete buildOptions.base
+  }
+
   if (buildOptions.mpa) {
     siteConfig.mpa = true
     delete buildOptions.mpa