diff --git a/.java-version b/.java-version
new file mode 100644
index 0000000..98d9bcb
--- /dev/null
+++ b/.java-version
@@ -0,0 +1 @@
+17
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..7b016a8
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "java.compile.nullAnalysis.mode": "automatic"
+}
\ No newline at end of file
diff --git a/dongjian-dashboard-back-controller/dockerfile b/dongjian-dashboard-back-controller/dockerfile
index b571e8e..5e3a05b 100644
--- a/dongjian-dashboard-back-controller/dockerfile
+++ b/dongjian-dashboard-back-controller/dockerfile
@@ -2,7 +2,8 @@
 # FROM openjdk:17-jdk
 FROM amazoncorretto:17-alpine
 # 安装 fontconfig 和 DejaVu 字体 (这是一个通用且免费的字体包)
-RUN apk --no-cache upgrade && \
+RUN apk --no-cache update && \
+    apk --no-cache upgrade && \
     apk --no-cache add fontconfig ttf-dejavu
 
 ENV TZ=Asia/Tokyo