dev-stack: wire nostr-transport env vars into lnbits service

Adds NOSTR_TRANSPORT_ENABLED + NOSTR_TRANSPORT_RELAYS so the
nostr-native-transport branch can be exercised end-to-end out of the
dev container without manual env overrides each spin-up.

Points the transport at the in-container nostrrelay extension (relay
id "test", which must be created once via the LNbits admin UI). The
transport's reconnect loop tolerates the relay not being ready at
startup — it retries every 5s — so first-time setup is just: bring
up the stack, create the relay in the UI, watch the transport log
"connected to ws://localhost:5001/nostrrelay/test".

Pairs with branch nostr-native-transport on aiolabs/lnbits.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docker-compose.dev.yml

@@ -28,6 +28,14 @@ services:
       LNBITS_EXTENSIONS_DEFAULT_INSTALL: "lnurlp,nostrclient,nostrrelay,nostrmarket,events,libra,satmachineclient,satmachineadmin"
       LNBITS_ADMIN_EXTENSIONS: "nostrclient,nostrrelay,satmachineadmin"
       LNBITS_USER_DEFAULT_EXTENSIONS: "lnurlp,nostrmarket,events,libra,satmachineclient"
+      # Nostr transport layer (HTTP-free RPC over kind-21000 events).
+      # On first boot a keypair is auto-generated and logged; copy the
+      # printed pubkey into your driver script. The relay points at the
+      # nostrrelay extension running inside the same container — a relay
+      # named "test" must be created via the UI before the transport
+      # will successfully connect (the reconnect loop retries every 5s).
+      NOSTR_TRANSPORT_ENABLED: "true"
+      NOSTR_TRANSPORT_RELAYS: '["ws://localhost:5001/nostrrelay/test"]'
     ports:
       - 5001:5001
     volumes: