updated/fixed install.sh

[zackbradys]

Please check below, if the PR fulfills these requirements:

• The commit message follows the guidelines.
• Tests for the changes have been added (for bug fixes / features).
• Docs have been added / updated (for bug fixes / features).

What kind of change does this PR introduce?

• bug fix for current install.sh

What is the current behavior?

• hauler will install successfully on most platforms, but can fail.

What is the new behavior (if this is a feature change)?

• hauler will install using bash instead of sh

Does this PR introduce a breaking change?

• no breaking changes

Other information:

• no additional information

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