Setup update and API Token Authentication

[gideonmaina]

Description

The main aim of this PR is to simplify local development and implement authentication for key endpoints prone to bot crawling or misuse by clients whilst fixing a few issues related to dependencies and migrations. The affected endpoints/views in API v1 are data, now and node. This will attempt to reduce the lag observed when making calls to the API.

Fixes issues #134, #135, #136

Setup changes

• The feinstaub sensors app was removed from the working tree as pip install takes care of that.
• The migration file *04 in sensorsafrica app was removed as it is applied before a dependency

Tests for these changes were both done using local and staging databases.

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Screenshots

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have successfully build the the project and performed necessary tests

[thepsalmist]

👍🏽

If I understand what we're trying to do, then I see this as breaking change i.e. the new secure endpoints are no longer v1 but v2 (or whatever v we're currently on).

My approach would be:

1. Create new v2 endpoints that work exactly like the equivalent v1 endpoints but secure.
2. Test and deploy backend to PROD.
3. Upgrade the front-end up to point to v2 endpoints.
4. Test and deploy front-end to PROD.
5. Remove or redirect unsecure v1 endpoints.
6. Test and deploy backend to PROD.
7. Profit

Cool, makes sense @gideonmaina I'll setup a review to plan for this implementation approach

[kilemensi]

PS: Not sure what SENSORSAFRICA_CELERY_SLACK_WEBHOOK_FAILURES_ONLY is for. If we need to send errors notifications to Slack, the best approach it to integrate with Sentry and Sentry will send notifications over email, Slack, etc.

[thepsalmist]

Changes should be merged in #138 , Tracked in #134