fix: Update directory structure for Ollama installation.

Dockerfile

@@ -4,7 +4,7 @@ COPY requirements.txt requirements.txt
 RUN pip install -r requirements.txt
 RUN apt update && apt -y upgrade && apt -y install curl
 RUN curl -fsSL https://ollama.com/install.sh | sh
-RUN mkdir -p /.ollama && chmod 755 /.ollama
+RUN mkdir -p /root/.ollama/id_ed25519 && chmod 755 /root/.ollama/id_ed25519
 RUN ollama start & OLLAMA_PID=$! ; ollama pull gemma2 ; kill $OLLAMA_PID
 EXPOSE 8501
 COPY streamlit_app.py generate_players.py resources/* ./