GitLab

* allow for a configurable ollama models directory

- set OLLAMA_MODELS in the environment that ollama is running in to change where model files are stored
- update docs
Co-Authored-By: Jeffrey Morgan <jmorganca@gmail.com>
Co-Authored-By: Jay Nakrani <dhananjaynakrani@gmail.com>
Co-Authored-By: Akhil Acharya <akhilcacharya@gmail.com>
Co-Authored-By: Sasha Devol <sasha.devol@protonmail.com>

unused after removing EMBED

- only reload the running llm if the model has changed, or the options for loading the running model have changed
- rename loaded llm to runner to differentiate from loaded model image
- remove logic which keeps the first system prompt in the generation context

* remove tmp directories created by previous servers

* clean up on server stop

* Update routes.go

* Update server/routes.go
Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com>

* create top-level temp ollama dir

* check file exists before creating

---------
Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com>
Co-authored-by: Michael Yang <mxyng@pm.me>

This informs the HTTP client the content length is known and disables
chunked Transfer-Encoding

get model and file type from bin file

parameters are not inherited because they are processed differently from
other layer. fix this by explicitly merging the inherited params into
the new params. parameter values defined in the new modelfile will
override those defined in the inherited modelfile. array lists are
replaced instead of appended

The `html/template` package automatically HTML-escapes interpolated strings in templates. This behavior is undesirable because it causes prompts like `<h1>hello` to be escaped to `&lt;h1&gt;hello` before being passed to the LLM.

The included test case passes, but before the code change, it failed:

```
--- FAIL: TestModelPrompt
    images_test.go:21: got "a&lt;h1&gt;b", want "a<h1>b"
```