OSError: [E050] Can't find model 'en_core_web_md'.

**Describe the bug**
When creating creating an agent instance, spacy.load("en_core_web_md") raises an exception.

**To Reproduce**
1. Start the web server.
2. Go to http://127.0.0.1:3002/v1/complete
3. See error

**Desktop (please complete the following information):**
- OS: [e.g. MacOS]
- Browser [chrome]

**Additional context**
After some research, I found that you need to run
```bash
python -m spacy download en_core_web_md
```
to download the package. I think this could be include in bash script when building the project.