Add troubleshooting guide for failed DB migration. closes #479

[cjamesanderson]

Detailed information:

Encountered an issue when installing the project locally where the database failed to migrate. Added information for resolving this issue to the troubleshooting guide.

Closing issues:

List all issues the pull request solve:

• 479

Test plan (required)

• [x] The PR contains new PyTest unit/integration tests for any function or functional added. (N/A)
• [x] The PR changes existing PyTest unit/integration tests to keep all tests up to date. (N/A)
• [x] The PR does not lead to degradation in unit test coverage.
• [x] Project parts affected by changes in this PR was tested manually on your local (using Postman or in any other way). List everything you've tested below:
  • Doc files

[codecov-commenter]

Codecov Report

Base: 72.33% // Head: 72.33% // No change to project coverage :thumbsup:

Coverage data is based on head (8f8150c) compared to base (5cb2a4a). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## docs #480 +/- ## ======================================= Coverage 72.33% 72.33% ======================================= Files 82 82 Lines 2639 2639 Branches 315 315 ======================================= Hits 1909 1909 Misses 695 695 Partials 35 35 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ClimateMind). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ClimateMind)

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