Update Dockerfile so that image supports "make software".

[tcal-x]

I ran into errors when I tried to run cd proj/proj_template_v && make software inside a container running the generated image, so I changed mkdir to mkdir -p, and added unzip and curl to the installed packages.

My commands to build and execute were:

$ docker build -t tims-image .
$ docker run -p 8080:80 -it tims-image  bash

and then cd to proj/proj_template_v and run make software.

Signed-off-by: Tim Callahan tcal@google.com

[tcal-x]

@PiotrZierhoffer fyi

[tcal-x]

@PiotrZierhoffer , I noticed that the Dockerfile installs a list of all the needed apt packages itself, instead of relying on the call to ./scripts/setup. It would be nice to test the completeness of ./scripts/setup here. I realize we need to make sure 'git' is installed in order to clone the repo in order to get the setup script, but other than that, is there a reason we can't just use ./scripts/setup? And then do rm -rf /var/lib/apt/lists/* as the final step?