Update Readme

Author: rolandszoke

README.md

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-# jsconfbp-2019-graphql-ui
+# JSCONF BP 2019 Graphql UI
+
+## Intro
+
+The following create-react-app application is UI for the previously built GQL API.
+
+You should be able to do the following actions:
+- Register and login a user
+- Create a post as a user
+- Comment on a post as a user
+- List out posts with filters
+- List out comments on a post
+
+There are 4 task to finish this application. Keep an eye out for the TODO comments.
+While finishing these 4 tasks you will learn some basic and some advanced practices on building an apollo-client based UI.
+
+Used dependencies:
+- State management: React features such as [hooks](https://reactjs.org/docs/hooks-intro.html) and [context](https://reactjs.org/docs/context.html).
+- Routing: [React-Router](https://reacttraining.com/react-router/web/guides/quick-start)
+- Components: [React-Bootstrap](https://react-bootstrap.github.io/)
+- Styling: [Sass](https://sass-lang.com/)
+- Linting: [ESLint](https://eslint.org/)
+- Additional packages: [Luxon](https://moment.github.io/luxon/), [Lodash](https://lodash.com/), [Husky](https://github.com/typicode/husky#readme)
+
+## Tasks
+
+### TASK 1.
+Migrate from apollo-boost, write an onError error handler and add a basic inmemory-cache to the apollo client. (TIP: [Migration](https://www.apollographql.com/docs/react/advanced/boost-migration/))
+- Extra task: Implement a global loader apollo middleware - increment number at request, decrement at response. (This will require a global state manager like Mobx or Redux)
+
+### TASK 2.
+Implement the handleSignin function and the SIGNIN_QUERY for the singin (Signin.jsx) page. (TIP: Use the register (Register.jsx) page for an example)
+- Extra task: create a User fragment and use it with every user query and mutation in the src/query/user.js and in the comment and post fragment. (TIP: Use the fragments.js for examples)
+
+### TASK 3.
+Using the Query component fetch down the post in the post (Posts.jsx) page.
+(TIP: Use the hello (Hello.jsx) page for an example, use limit and filters variables)
+- Extra task: when you are done, translate your Query component to a useQuery hook.
+
+### TASK 4.
+Using useQuery hook and fetchMore implement the querying behind the comments section and its pagination for the post (Post.jsx) page. (TIP: Use the posts (Posts.jsx) page for an example, use a reasonable fetchPolicy option so you will be able to see new comments)
+- Extra task: implement the handleCreateComment function and CREATE_COMMENT_MUTATION mutatation for comment posting (TIP: use the refetch after posting the new comment from the useQuery hook in the original task)