### Description
Given all the shell files that now exist in the repo, would be nice to
have linting/formatting around them (in addition to the existing
shellcheck which doesn't do anything to format the shell code). This PR
introduces `shfmt` to both check for changes and apply formatting when
the associated make targets are called.
The home directory for our dockerfile changed and broke this script. To
verify, try running the benchmark script:
```
export DOCKER_TEST=true
./scripts/performance/benchmark.sh
```
I'll pull in the latest changelog before merging.
