using su-exec from apk

install/Dockerfile

@@ -1,23 +1,6 @@
-FROM alpine as builder
-
-RUN set -x\
- && apk add --no-cache\
-  gcc\
-  make\
-  git\
-  musl-dev
-
-RUN git clone https://github.com/ncopa/su-exec.git /su-exec
-
-WORKDIR /su-exec
-RUN make
-RUN strip su-exec
-
 FROM node:alpine
 
-COPY --from=builder /su-exec/su-exec /sbin/
-
-RUN apk add --update bash && rm -rf /var/cache/apk/*
+RUN apk add --update bash su-exec && rm -rf /var/cache/apk/*
 RUN mkdir -p /app
 RUN mkdir /.config
 RUN chmod a+rwx /.config
@@ -30,3 +13,4 @@ RUN npm link
 WORKDIR /data
 
 ENTRYPOINT ["/sbin/su-exec"]
+RUN find / -perm +6000 -type f -exec chmod a-s {} \; || true