docs: finish README

Author: eliasmueller

README.md

@@ -1 +1,17 @@
-# Experiment Executor
+# Experiment Executor
+
+The Experiment Executor is a component of the MiSArch Experiment Tool and is responsible for executing experiments defined in an experiment. 
+It provides a REST API to trigger and manage experiments.
+
+## Documentation
+
+Detailed information about the Experiment Executor service can be found in the [documentation](https://misarch.github.io/docs/docs/dev-manuals/other-repositories/experiment-executor).
+
+
+## Getting started
+
+A development version of the Experiment Executor service can be started using docker compose:
+
+```bash
+docker-compose -f docker-compose-base.yaml up --build
+```