Posthog Reverse proxy for nginx

Dockerfile

FROM nginx:alpine
COPY nginx.conf /etc/nginx/nginx.conf

nginx.conf

# The main context
events {
    worker_connections 1024;
}

http {
    server {
        listen 8080;  # Set the port to 8080

        server_name _;  # Accept requests for any domain

        # Check Referer header
        # Customise as needed to ensure requests only come from your domain
        set $valid_referer 0;
        if ($http_referer ~* "^https?://(localhost|([a-zA-Z0-9-]+)\.brieftech\.ai)") {
            set $valid_referer 1;
        }

        if ($valid_referer = 0) {
            return 403;  # Return forbidden if the Referer header is invalid
        }

        location /static/ {
            proxy_pass https://eu-assets.i.posthog.com/static/;
            proxy_set_header Host eu-assets.i.posthog.com;
        }

        location / {
            proxy_pass https://eu.i.posthog.com/;
            proxy_set_header Host eu.i.posthog.com;
        }
    }
}