Adding -p flag to mkdir so it doesnt fail when the folder is already …

…present

docker/ci/ci.sh

@@ -43,7 +43,7 @@ function main() {
     case $1 in
     up)
         # Main folder created here to grant access to both containers
-        mkdir artifacts
+        mkdir -p artifacts
         $compose_cmd up -d
         ;;
     down)