From 0026639ee81d7af946c8fbb933c6f250aa5c29de Mon Sep 17 00:00:00 2001
From: Dayuan Jiang <34411969+DayuanJiang@users.noreply.github.com>
Date: Mon, 5 Jan 2026 21:40:15 +0900
Subject: [PATCH] fix: add NEXT_PUBLIC_BASE_PATH build arg for subdirectory
 deployment (#518)

Dockerfile was missing the ARG declaration to receive NEXT_PUBLIC_BASE_PATH
from docker-compose build args, causing subdirectory deployment to fail.

Fixes #478
---
 Dockerfile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Dockerfile b/Dockerfile
index fb67400..a4af980 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -30,6 +30,10 @@ ENV NEXT_PUBLIC_DRAWIO_BASE_URL=${NEXT_PUBLIC_DRAWIO_BASE_URL}
 ARG NEXT_PUBLIC_SHOW_ABOUT_AND_NOTICE=false
 ENV NEXT_PUBLIC_SHOW_ABOUT_AND_NOTICE=${NEXT_PUBLIC_SHOW_ABOUT_AND_NOTICE}
 
+# Build-time argument for subdirectory deployment (e.g., /nextaidrawio)
+ARG NEXT_PUBLIC_BASE_PATH=""
+ENV NEXT_PUBLIC_BASE_PATH=${NEXT_PUBLIC_BASE_PATH}
+
 # Build Next.js application (standalone mode)
 RUN npm run build