Use CircleCI secure context when uploading bundle to Backblaze

[jdeanwallace]

Resolves https://github.com/tiny-pilot/tinypilot-pro/issues/1260

We need to make the following changes in CircleCI:

1. Create a CircleCI secure context for TinyPilot Community.

   1. Open the TinyPilot CircleCI context
   2. Click "Create Context"
   3. Enter a context name:
      • Perhaps we should name it community-production?
   4. Click "Create Context"

2. Restrict the TinyPilot Community context to only be used on the master branch and when SSH is disabled on the CI job.

   1. Click the TinyPilot Community context
   2. Click "Add Expression Restriction"
   3. Enter the following expression in the text box:
      • pipeline.git.branch == "master" and not job.ssh.enabled
   4. Click "Add Expression Restriction"

3. Add new production Backblaze credentials to the TinyPilot Community context

   • Follow these instructions.

After we've merged this PR, we can remove the BACKBLAZE_* environment variables from the TinyPilot Community CircleCI project settings.

[jdeanwallace]

Automated comment from CodeApprove ➜

⏳ @mtlynch please review this Pull Request

[codeapprove[bot]]

Automated comment from CodeApprove ➜

👀 @jdeanwallace it's your turn, please take a look

[mtlynch]

We need to make the following changes in CircleCI:

@jdeanwallace - Done

Except I named it production-tinypilot-community to match the naming scheme we used for gatekeeper.

[jdeanwallace]

Automated comment from CodeApprove ➜

⏳ @jotaen4tinypilot please review this Pull Request