docker: bake espeak-ng data for Piper TTS

espeak-rs-sys installs espeak-ng-data into the build tree and compiles that
path in as the default, so the runtime image failed with 'phontab: No such
file or directory'. Copy the data from the builder to /usr/share and point
PIPER_ESPEAKNG_DATA_DIRECTORY there; compose overrides the host path from
.env.

Also trim trailing slashes from Copyparty base URLs, document that env_file
changes need --force-recreate, and clean inline comments in .env.example.

1 files changed, 2 insertions, 0 deletions

diff --git a/compose.yaml b/compose.yaml
index eac326f..68b7cae 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -16,6 +16,8 @@ services:
       # The host .env points TTS_MODEL_PATH at an absolute host path, which
       # does not exist inside the container. The model is mounted below.
       TTS_MODEL_PATH: /app/piper
+      # espeak-ng data is baked into the image by the Dockerfile.
+      PIPER_ESPEAKNG_DATA_DIRECTORY: /usr/share
       # Override if the bot should not use Polish local time for cron jobs.
       # TZ: Europe/Warsaw
     volumes: