Feature: Add Scripts and Dockerfile for Cortex CPP

[hiento09]

This PR adds the necessary scripts and Dockerfile to set up and run Cortex using Docker. The following files are included:

1. entrypoint.sh:

• Installs the cortex.llamacpp engine.
• Starts the Cortex server.
• Keeps the container running by tailing the log files.

2. Dockerfile:

• Uses Ubuntu 22.04 as the base image.
• Installs necessary dependencies.
• Downloads and installs the latest versions of cortex.llamacpp and cortex.cpp.
• Copies the entrypoint script and sets it as the entrypoint for the container.
• Exposes port 39281 and sets up a health check.

3. download-cortex.llamacpp.sh:

• Fetches the latest version of cortex.llamacpp if not specified.
• Downloads various cortex.llamacpp engine versions and stores them in /opt/cortex.llamacpp.

4. download-cortex.cpp.sh:

• Fetches the latest version of cortex.cpp if not specified.
• Downloads and installs cortex.cpp to /usr/local/bin.

These additions will facilitate the setup and deployment of Cortex in a Docker container, making it easier to manage and run the Cortex server.

Related issue #365

[hiento09]