Add PostHog integration for product analytics

[dariomory]

Description

Add PostHog as an optional analytics provider alongside Sentry for error tracking, for product analytics and feature flags.

Rationale

Most projects need product analytics, but current options have privacy concerns and complex setup. PostHog is open-source (https://github.com/PostHog/posthog) and fills the same role as Sentry but for user behavior instead of errors and completes the essential observability stack alongside error tracking.

Proposed Implementation:

• Add use_posthog cookiecutter option (y/n)
• Include posthog package in requirements when enabled
• Configure PostHog in Django settings with environment variables
• Add PostHog JavaScript snippet to base template when enabled

[sanyamk23]

Hi! Thanks for suggesting this. Adding PostHog as an optional analytics provider sounds like a great way to give projects more flexibility and privacy-friendly analytics.

My approach would be:

• Add a use_posthog option to the cookiecutter setup.
• If enabled, include the posthog package in the requirements.
• Update the Django settings to configure PostHog using environment variables.
• Inject the PostHog JavaScript snippet into the base template when the option is enabled.

This should make it easy for users to opt in to PostHog and have it fully configured out of the box.

If no one else is working on this, I’d be happy to take it on and open a PR. Does this approach sound good, or is there anything else I should keep in mind before starting? Let me know if you’d like me to move forward!