modifies readme

Author: eguezgustavo

README.md

@@ -1 +1,15 @@
-skeleton of a time tracker application
+# Time tracker
+IOET Time tracker system
+
+## Architecture
+The application follows a DDD approach with a hexagonal clean architecture. BIG WORDS!, what does it mean? it means the following:
+- We have a directory for each domain entitiy (i.e. time entries, technologies, activities, etc)
+- Inside each entity directory we have other 3 directories (application, domain and infrastructure)
+- I'll leave this drawing to understand how these three folders work and what logic should be included in these directories:
+![DDD design](/ddd.png)
+Taken from [Microsoft Docs](https://docs.microsoft.com/en-us/dotnet/architecture/microservices/microservice-ddd-cqrs-patterns/ddd-oriented-microservice)
+
+## How to contribute
+- Clone the repository, create a new branch, implement the logic taken the architecture into account and create a PR
+- Wait for the pipeline to run a be on green
+- Please ask for peer review in the #timetracker-collaboration slack channel