fix: add OLLAMA_BASE_URL for openwebui, gitignore .env

Ollama runs on port 11436, not the default 11434. Add explicit
OLLAMA_BASE_URL=http://host.docker.internal:11436 so open-webui
finds the models. Also gitignore .env (holds ANTHROPIC_API_KEY).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

openwebui/.gitignore

@@ -0,0 +1 @@
+.env

openwebui/docker-compose.yml

@@ -18,6 +18,7 @@ services:
               capabilities: [gpu]
     environment:
       - ANTHROPIC_API_KEY=${ANTHROPIC_API_KEY}
+      - OLLAMA_BASE_URL=http://host.docker.internal:11436
       - OPENAI_API_BASE_URL=http://host.docker.internal:4000/v1
       - OPENAI_API_KEY=dummy
       # STT — Faster-Whisper large-v3-turbo