Add trailing slash to proxy_pass directive so nginx strips the /api/
prefix before forwarding requests to the API container. This fixes
routes like /api/docs being passed as /api/docs instead of /docs.
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Co-Authored-By: Claude <noreply@anthropic.com>
Use nginx template support to allow API_URL to be passed at container
runtime, enabling the same image to be deployed to different environments.
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Co-Authored-By: Claude <noreply@anthropic.com>