Update Dockerfile

Dockerfile

@@ -18,13 +18,17 @@ WORKDIR $HOME/app
 COPY --chown=user . $HOME/app
 
 # Download VOICEVOX Core from latest Release
-RUN curl -sSfL https://github.com/VOICEVOX/voicevox_core/releases/latest/download/download-linux-x64 --output download
-
-# Give execution permissions
-RUN chmod +x ./download
-
-# Install VOICEVOX Core
-RUN ./download --output voicevox_core
+RUN curl -s https://api.github.com/repos/VOICEVOX/voicevox_core/releases/latest \
+    | jq -r '.assets[] | select(.name|test("^voicevox_core-linux-x64.*\\.zip$")) | .browser_download_url' \
+    | xargs curl -L -o voicevox_core.zip
+
+# Extract VOICEVOX Core and flatten if needed
+RUN unzip voicevox_core.zip -d voicevox_core && \
+    cd voicevox_core && \
+    entries=($(find . -mindepth 1 -maxdepth 1)) && \
+    [ ${#entries[@]} -eq 1 ] && \
+    mv "${entries[0]}"/* . && \
+    rmdir "${entries[0]}"
 
 # Clone VOICEVOX Engine from Git Repository
 RUN git clone https://github.com/VOICEVOX/voicevox_engine.git voicevox_engine