bug: install_bazel.sh installs bazel on file system root (e.g. /)

[mbernico]

It's probably better to install bazel in the user's home directory (~/.bazel) or even usr/local. This could make it harder to deal with space and most users probably don't have access to write to the root fs.

Small thing, happy to submit a PR if desired.

[advaitjain]

Yes, this would be a good change. Thanks!