Adding support for prettier python plugin

- updating Dockerfile to include python3 on vim test bed image in order
to work with prettier python plugin
- prettier python plugin seems to require python3 to be available on the
system

1 files changed, 1 insertions, 0 deletions

diff --git a/Dockerfile b/Dockerfile
index 262d875..2c8ff50 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,6 +34,7 @@ ENV PACKAGES="\
     bash \
     git \
     python \
+    python3 \
     py-pip \
     nodejs \
     npm \