Allow bind mounted source to be visible when selinux present

Adding the :Z onto bind mount of the source so it can be viewed.
(:Z = private and unshared)

Rakefile

@@ -31,7 +31,7 @@ task :build do
       builder = "choria/packager:el7-go1.16"
     end
 
-    sh 'docker run --rm -v %s:/var/run/docker.sock -v `pwd`:%s -e SOURCE_DIR=%s -e ARTIFACTS=%s -e SHA1="%s" -e BUILD="%s" -e VERSION="%s" -e PACKAGE=%s %s' % [
+    sh 'docker run --rm -v %s:/var/run/docker.sock -v `pwd`:%s:Z -e SOURCE_DIR=%s -e ARTIFACTS=%s -e SHA1="%s" -e BUILD="%s" -e VERSION="%s" -e PACKAGE=%s %s' % [
       docker_socket,
       source,
       source,
@@ -53,7 +53,7 @@ task :build_binaries do
 
   source = "/go/src/github.com/choria-io/aaasvc"
 
-  sh 'docker run --rm  -v `pwd`:%s -e SOURCE_DIR=%s -e ARTIFACTS=%s -e SHA1="%s" -e BUILD="%s" -e VERSION="%s" -e BINARY_ONLY=1 choria/packager:el7-go1.16' % [
+  sh 'docker run --rm  -v `pwd`:%s:Z -e SOURCE_DIR=%s -e ARTIFACTS=%s -e SHA1="%s" -e BUILD="%s" -e VERSION="%s" -e BINARY_ONLY=1 choria/packager:el7-go1.16' % [
     source,
     source,
     source,