fix(docker): add extra_hosts so Logto can reach itself via public hostname

Logto validates M2M tokens by fetching its own JWKS from the ENDPOINT
URL (e.g. https://app.cameleer.io/oidc/jwks). Behind a Cloudflare
tunnel, that hostname resolves to Cloudflare's IP and the container
can't route back through the tunnel — the fetch times out (ETIMEDOUT),
causing all Management API calls to return 500.

Adding extra_hosts maps AUTH_HOST to host-gateway so the request goes
to the Docker host, which has Traefik on :443, which routes back to
Logto internally. This hairpin works because NODE_TLS_REJECT=0 accepts
the self-signed cert.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

installer/templates/docker-compose.saas.yml

@@ -32,6 +32,11 @@ services:
       SMTP_USER: ${SMTP_USER:-}
       SMTP_PASS: ${SMTP_PASS:-}
       SMTP_FROM_EMAIL: ${SMTP_FROM_EMAIL:-noreply@cameleer.io}
+    extra_hosts:
+      # Logto validates M2M tokens by fetching its own JWKS from ENDPOINT.
+      # Route the public hostname back to the Docker host (Traefik on :443)
+      # so the container can reach itself without going through the tunnel.
+      - "${AUTH_HOST:-localhost}:host-gateway"
     healthcheck:
       test: ["CMD-SHELL", "node -e \"require('http').get('http://localhost:3001/oidc/.well-known/openid-configuration', r => process.exit(r.statusCode === 200 ? 0 : 1)).on('error', () => process.exit(1))\" && test -f /data/logto-bootstrap.json"]
       interval: 10s