docs: Added contribution guidelines

CONTRIBUTING.md

@@ -17,4 +17,38 @@ dataset = load_dataset("../.", split="train")
 # make transformations here
 ```
 
-> Note: While it is local Huggingface still uses a cache, therefore you might need to reset it after changes have been made to see that it works correctly. You can do this by deleting the cached files which you can locate using `dataset.cache_files`.
+> Note: While it is local Huggingface still uses a cache, therefore you might need to reset it after changes have been made to see that it works correctly. You can do this by deleting the cached files which you can locate using `dataset.cache_files`.
+
+## Installing dependencies
+
+This repo comes with a few dependencies you need to install to make this run. It uses a [makefile](https://opensource.com/article/18/8/what-how-makefile) to run commands and a [uv](https://docs.astral.sh/uv/) for package management. Once you have uv installed you can install the dependencies using:
+
+```bash
+make install
+```
+
+## Running dataset tests
+
+This dataset is special as it comes with a test suite, e.g. testing in the ids are unique and that the format is consistent. You can run the suite using
+
+```bash
+make test
+```
+
+## Submitting a PR
+
+Creating a PR on Huggingface is a bit different from creating one on Github.
+
+1) Go to the community tab on huggingface press *new pull request* and choose *on your machine*. Specify the title of the your PR. Then you can simply:
+
+```bash
+git checkout pr/{PR NUMBER}
+# make your changes here 
+# push to hub
+git push origin pr/11:refs/pr/11
+```
+
+Before you make the PR do be sure to make sure that the tests have been run.
+
+To see example PR you can see the following:
+- [Restructuring columns in the dataset](https://huggingface.co/datasets/danish-foundation-models/danish-gigaword-2/discussions/11)

README.md

@@ -125,6 +125,7 @@ language_bcp47:
   - [Dataset Creation](#dataset-creation)
     - [Source Data](#source-data)
   - [Additional Information](#additional-information)
+    - [Contributing the dataset](#contributing-the-dataset)
     - [Citation Information](#citation-information)
 
 ## Dataset Description
@@ -280,8 +281,12 @@ longname_mapping_dict = {
 }
 ```
 
+
 ## Additional Information
 
+### Contributing the dataset
+
+We welcome contributions to the dataset such as new sources, better data filtering and so on. To get started on contributing please see [the contribution guidelines](CONTRIBUTING.md)
 
 ### Citation Information