add git executable to porter-cli container

services/porter_cli_container/Dockerfile

@@ -2,7 +2,7 @@ FROM ubuntu:latest
 
 COPY get-porter-cli.sh /scratch/
 
-RUN apt-get update && apt-get install -y curl unzip
+RUN apt-get update && apt-get install -y curl unzip git
 
 ARG VERSION