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, 3 insertions, 2 deletions

diff --git a/src/copyparty/mod.rs b/src/copyparty/mod.rs
index a9f7d01..d3620b2 100644
--- a/src/copyparty/mod.rs
+++ b/src/copyparty/mod.rs
@@ -147,8 +147,9 @@ pub struct UploadResponse {
 impl CopypartyClient {
     pub fn new(base_url: String, upload_url: String, password: Option<String>) -> Self {
         Self {
-            base_url,
-            upload_url,
+            // A trailing slash would produce `//` when a path is appended.
+            base_url: base_url.trim_end_matches('/').to_string(),
+            upload_url: upload_url.trim_end_matches('/').to_string(),
             password,
             client: Client::new(),
         }