refactor:

README.md

@@ -1,2 +1,55 @@
-# java-explore-with-me
-Template repository for ExploreWithMe project.
+# Explore With Me
+
+---
+
+## Stack: 
+- Java 11
+- Spring Boot
+- Spring Data JPA
+- PostgreSQL
+- Docker
+- Maven
+---
+
+Free time is a valuable resource. Every day, we plan how to spend it – where to go and with whom.  
+The most challenging part of this planning is finding information and negotiating.  
+You need to consider many details: what events are planned, whether friends are available at that moment,  
+how to invite everyone, and where to meet.
+"Explore With Me" is an event listing. In this event listing, you can propose any event,  
+from an exhibition to a trip to the movies, and gather a group to participate in it.
+---
+
+## Microservice architecture
+The application consists of 2 services:
+
+- stats-service - a part of the application that collects, stores, and provides statistics on views upon request.
+- main-service - the core part of the application where all the application's logic takes place.
+
+---
+
+### The event lifecycle consists of several stages:
+- PENDING
+- CANCELED
+- PUBLISHED 
+
+### There are 3 actors:
+- Initiator (owner of event)
+- Administrator (moderator)
+- Participant (anyone who want to take a part in event)
+- 
+Initiator can create and event.
+The event get PENDING state immediately after Initiator save it in a database.  
+The Administrator can make a decision to approve or reject publication.
+
+Everyone can take part an event and make a request for participation.
+Initiator can make a decision to approve or reject participation.
+It's possible to take part in a event only in a PUBLISHED event.
+
+Each GET event request saved in statistics service.
+---
+## main-service database schema (https://dbdiagram.io/d/explore-with-me-654191b67d8bbd64653c2052)
+![Diagram](main-serivce-schema-db.png)
+
+## stat-service database schema (https://dbdiagram.io/d/explore-with-me-stats-65469ec17d8bbd64657d8f1c)
+![Diagram](stats-db.png)
+---