Fix node install and make mock_llm script executable

Dockerfile

@@ -25,17 +25,16 @@ RUN apt-get update && \
     apt-get install -y \
     google-chrome-stable
 
+# Install Node.js
+RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
+RUN apt-get install -y nodejs
+
 RUN rm -rf /var/lib/apt/lists/*
 
 # Install Rust
 RUN curl https://sh.rustup.rs -sSf | bash -s -- -y
 ENV PATH="/root/.cargo/bin:${PATH}"
 
-# Install Node.js
-RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh | bash
-ENV NVM_DIR=/root/.nvm
-RUN . "$NVM_DIR/nvm.sh" && nvm install node
-
 # Install llama.cpp
 RUN curl -O https://git.nielsgeens.be/api/packages/llm/generic/llama.cpp/b5269/llama.cpp.tar
 RUN tar -xf /llama.cpp.tar -C /usr/local/bin --wildcards --no-anchored "llama-*"