I have to set permission on /tmp/fetch_binaries.sh

Before that I was receiving the error:

 => ERROR [fetcher 4/4] RUN /tmp/fetch_binaries.sh                                                                                                     0.9s
------
 > [fetcher 4/4] RUN /tmp/fetch_binaries.sh:
nicolaka#13 0.784 /bin/sh: 1: /tmp/fetch_binaries.sh: Permission denied

Dockerfile

@@ -5,6 +5,8 @@ RUN apt-get update && apt-get install -y \
   curl \
   wget
 
+RUN ["chmod", "+x", "/tmp/fetch_binaries.sh"]
+
 RUN /tmp/fetch_binaries.sh
 
 FROM alpine:3.13