diff --git a/Dockerfile b/Dockerfile
index c2482da..47cda85 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,8 +2,9 @@ FROM alpine
 
 ARG BUILDARCH
 WORKDIR /app
-RUN apk add --no-cache tzdata
+RUN apk add --no-cache tzdata file
 COPY ./${BUILDARCH}/release /app/
+RUN file /app/apimain
 VOLUME /app/data
 
 EXPOSE 21114