GitLab

Fixes #282

Fixes #297
Fixes #296

num_keep defines how many tokens to keep in the context when truncating
inputs. if left to its default value of -1, the server will calculate
num_keep to be the left of the system instructions

* resolves: https://github.com/jmorganca/ollama/issues/300 and
https://github.com/jmorganca/ollama/issues/282

* example usage:
```
ollama serve --port 9999 --allowed-origins "http://foo.example.com,http://192.0.0.1"
```

switch to a monolithic upload instead of a chunk upload through a pipe
to report progress

- read runner options from map to see what was specified explicitly and overwrite zero values

ioutil is deprecated