Merge pull request #4 from jamjon3/develop

Setting the version number consistently after first dependabot PR

Merge pull request #2 from jamjon3/dependabot/pip/pyinstaller-approx-…

…eq-5.7.0

Update pyinstaller requirement from ~=5.6.2 to ~=5.7.0

Merge pull request #1 from jamjon3/develop

Switching this to multistage docker build

Fixing a conflict