Update README.md

Author: loreabad6

README.md

@@ -293,6 +293,9 @@ for the moment please be aware and patient with us :pray:
 
 Feel free to open an issue if you find some new bug or have any request!
 
+Please refer to our [contributing guide](https://github.com/SliDEM-project/SliDEM-python/blob/main/CONTRIBUTING.md) for further info.
+
+
 ## Acknowledgements
 
 This work is supported by the Austrian Research Promotion Agency (FFG)
@@ -312,4 +315,4 @@ Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
-limitations under the License.
+limitations under the License.