add git-core and tls set

Author: kmuto

Dockerfile

@@ -14,7 +14,7 @@ MAINTAINER takahashim
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
-      locales && \
+      locales git-core curl ca-certificates && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 RUN echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen