Drone: correctie pipeline

.drone.yml

@@ -22,9 +22,9 @@ steps:
   environment:
     DOWNLOADDIR: /usr/share/nginx/html/download/python/lmwsip
   commands:
-  - mkdir -p "${DOWNLOADDIR}"
+  - mkdir -p "$${DOWNLOADDIR}"
   - cd dist
-  - for f in *;do if [ -f "${DOWNLOADDIR}/${f}" ] ; then echo version error;exit 1;else cp "${f}" "${DOWNLOADDIR}";fi;done
+  - for f in *;do if [ -f "$${DOWNLOADDIR}/$${f}" ] ; then echo version error;exit 1;else cp "$${f}" "$${DOWNLOADDIR}";fi;done
   when:
     branch:
     - master