Updated documentation

README.md

@@ -16,11 +16,7 @@ The package can be currently installed from the GitLab repository:
 pip install git+https://git.dynare.org/Dynare/dynare-python.git
 ```
 
-## Example
-
-For an example on how to use the package, see `test/test_dynare.py`.
-
-### Simple example
+### Quickstart
 
 ```python
 from dynare import dynare
@@ -28,3 +24,22 @@ from dynare import dynare
 context = dynare("<path_to_model_file.mod>")
 print(context)
 ```
+
+## Example
+
+For an example on how to use the package, see `test/test_dynare.py`.
+
+## Configuration
+
+To reuse and existing Julia environment, set the `PYTHON_JULIAPKG_EXE=<exe>` and `PYTHON_JULIAPKG_PROJECT=<project>` environment variables as documented in [pyjuliapkg](https://github.com/JuliaPy/PyJuliaPkg?tab=readme-ov-file#configuration).
+
+### No X-Windows server
+
+Dynare will try to open windows on your machine when it's completed computing. If there is no display on your system, you probably want to set the following environment variables to avoid related
+error messages:
+
+```
+export QT_QPA_PLATFORM=offscreen
+export DESKTOP_SESSION=none
+```
+