Update Dockerfile

Dockerfile

@@ -27,8 +27,7 @@ RUN chmod +x download.sh
 RUN ./download.sh
 
 # Clone VOICEVOX Engine from Git Repository
-RUN git clone --depth=1 --branch $(git ls-remote --tags --sort="v:refname" https://github.com/VOICEVOX/voicevox_engine.git | tail -n1 | awk -F/ '{print $NF}') https://github.com/VOICEVOX/voicevox_engine.git
-
+RUN git clone --branch v0.22.2 --depth=1 https://github.com/VOICEVOX/voicevox_engine.git
 
 # Install requirements.txt
 RUN pip install --no-cache-dir --upgrade -r voicevox_engine/requirements.txt