Build Container Image for Cap9

[JakeOShannessy]

Our current circleci config is quite verbose because it needs to handle a bunch of base dependencies like gcc, ssl, cmake etc. It would be much simpler if we could just pull in our own image which had all of these things installed. Here's a wishlist of pre-installed items:

• rustup
• systemd-devel
• git
• make
• gcc-c++
• gcc
• file
• binutils
• openssl-devel
• clang
• https://github.com/gflags/gflags.git

The information for all of these can be found in the circleci config. Many will have different names depending on platform and some might not be necessary if we don't have to build the others.