chore: fix netlify doc publish (#1431)

## This PR
<!-- add the description of the PR here -->

- disable package mode in the Python project

### Notes

Netlify build output

```
Warning: The current project could not be installed: No file/folder found for package flagd-dev
If you do not want to install the current project use --no-root.
If you want to use Poetry only for dependency management but not for packaging, you can disable package mode by setting package-mode = false in your pyproject.toml file.
In a future version of Poetry this warning will become an error!
```
I resolved the issue by following this guide.

https://docs.netlify.com/frameworks/#mkdocs

---------

Signed-off-by: Michael Beemer <beeme1mr@users.noreply.github.com>

netlify.toml

@@ -1,14 +1,8 @@
 [build]
   publish = "site"
   # https://docs.netlify.com/configure-builds/ignore-builds/
-  ignore = "git diff --quiet $CACHED_COMMIT_REF $COMMIT_REF netlify.toml mkdocs.yml pyproject.toml ./docs/"
-  command = """
-    pip3 install -q poetry &&
-    poetry config virtualenvs.in-project true &&
-    poetry lock &&
-    poetry install -v &&
-    mkdocs build
-  """
+  ignore = "git diff --quiet $CACHED_COMMIT_REF $COMMIT_REF netlify.toml mkdocs.yml requirements.txt ./docs/"
+  command = "mkdocs build"
 
 [[headers]]
   # Relax cross origin restrictions for schemas, so they can be requested by front-end apps.