NEXT_PUBLIC_VAPID_PUBLIC_KEY (and the OAuth *_ENABLED flags) are inlined
into the client bundle by next build — setting them as container env vars
at runtime does nothing, since the client JS was already built without
them. Client bundle shipped with applicationServerKey: undefined, so
pushManager.subscribe() threw and the button always failed with "Failed
to enable notifications."
Wire them as Docker build args (Dockerfile ARG/ENV before `next build`,
compose.prod.yml build.args), sourced from the same stack env vars used
at runtime so they stay in sync.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Arnaud
5ff8ef5547