fix: move dist to web-dist/ to avoid dockerignore conflicts

web-dist/assets/audio/README-welcome-speech.md

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+# Welcome Noderunner Speech
+
+The intro plays a sci-fi female voice saying "Welcome Noderunner" as the text types in.
+
+## Generate the audio (ElevenLabs)
+
+1. Get a free API key at [elevenlabs.io](https://elevenlabs.io) (free tier: 10k chars/month)
+2. Run:
+   ```bash
+   cd neode-ui
+   ELEVENLABS_API_KEY=your_key npm run generate-welcome-speech
+   ```
+3. Commit `welcome-noderunner.mp3` to the repo
+
+## Custom sci-fi voice
+
+Browse [ElevenLabs Voice Library](https://elevenlabs.io/voice-library) and search for "sci-fi", "AI", "robot", or "character". Copy the voice ID from the URL or voice settings, then:
+
+```bash
+ELEVENLABS_API_KEY=your_key ELEVENLABS_VOICE_ID=voice_id npm run generate-welcome-speech
+```
+
+Recommended: "The Digital Oracle", "The Friendly AI Assistant", or similar character voices from the Synthetic/Character categories.