Fix: Suppress spurious end-file event when starting playback and tts.speak (#179)

* bugfix: supress first end of file event and only callback on second one
* add some notes on testing
* fixed tts.speak
* fix unduck after timer end
* use custom docker-entrypoint on dev container
* change mv to copy in the docs when using .env file

docker-compose.dev.yml

@@ -47,6 +47,7 @@ services:
       - ${LVA_XDG_RUNTIME_DIR}:${LVA_XDG_RUNTIME_DIR}
       # Mount source code for development
       - ./linux_voice_assistant:/app/linux_voice_assistant
+      - ./docker-entrypoint.sh:/app/docker-entrypoint.sh
       - ./version.txt:/app/version.txt
       - ./version_githash.txt:/app/version_githash.txt
     depends_on: