[MISC] cp instead of mv for creation of dumb secrets

docker_test.sh

@@ -39,7 +39,7 @@ if [[ -d secrets ]]; then
   echo -e "\n==== Create dumb secret files ===="
   for f in *.secrets.example; do
       echo -e "\tFile $1/secrets/$(basename -- "$f" .secrets.example).secrets created"
-      mv -- "$f" "$(basename -- "$f" .secrets.example).secrets"
+      cp -- "$f" "$(basename -- "$f" .secrets.example).secrets"
   done
   cd ..
 fi