Added README.md to describe task.

task03/README.md

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+# Getting Started
+
+This project contains everything to get started with an api first spring service.
+Don't worry if it shows errors. Try to run `maven compile`. It should fix those errors.
+
+In the beginning it uses the default open api example (Pet Store - without the file upload).
+You can find the spec in `src/main/resources/api.yaml`. For a better understanding you can view
+it here: https://editor-next.swagger.io/
+
+When starting the spring service - execute Task03Application - go to http://localhost:8080/swagger-ui.html.
+Execute /api/v3/pet/{petId}. It's the only enpoint that's "implemented".
+
+# Task 03
+
+Let's develop a simple blog service. It's possible to create, update and delete posts. Not every post is 
+published. You also need to provide a way to lock posts so that an author can edit them. See the Zalando
+api guid for inspiration. Users can comment under posts. A post contains the text itself, a state and the
+id of the author. A comment consist of the text and the user id. Authors are also users.
+Users won't be manged by this service so we only deal with the ids.
+
+1. Think about the resource you need - keep the best practices in mind
+2. Design your api in https://editor-next.swagger.io/
+3. Copy your api into `src/main/resources/api.yaml`
+4. Execute `maven clean complie` - do this everytime your api changes
+5. Implement static returns (you don't need to store the requests, just "fake it")
+
+
+
+
+