feat: Add audio device support in Docker container systemd service

- Mount `/dev/snd` device to enable audio input in the Docker container
- Ensure proper sound device access for BirdNET-Go service

install.sh

@@ -1127,6 +1127,7 @@ Requires=docker.service
 Restart=always
 ExecStart=/usr/bin/docker run --rm \\
     -p 8080:8080 \\
+    --device /dev/snd \\
     --env TZ="${TZ}" \\
     ${AUDIO_ENV} \\
     -v ${CONFIG_DIR}:/config \\