Update README.md

Author: zoranuri

README.md

@@ -1,2 +1,20 @@
-# prerequisites-tester
-A tester application used to verify that a customer environment's prerequisites for using Lightrun are met
+# Lightest
+Lightest is a tester application used to verify that a customer environment's prerequisites for using Lightrun are met.
+
+Currently, the test application supports the following tests:
+- **Long polling test** - which tests that the test application can register as a Lightrun agent and perform `getBreakpoints` long polling requests for a period of time.
+- **Websocket connectivity test** - which tests that the test application can authenticate as a Lightrun client, establish a websocket connection and maintain its connectivity for a period of time.
+
+## Usage
+
+Since Go supports cross-compiling and comes with a built-in compiler support for multiple OSs and architectures, building a OS and architecture specific executables is simple.
+The Github release page should include the latest distributions for a combination of OSs and architectures we would like to support.
+Running the tester simply requires running the relevant distributed executable.
+
+### Configuration
+
+Before running the executable, the accompanied `config.json` file should be configured according to your needs.
+Configuring it is straightforward, as the necessary configuration file parameters written in the config should be relatively self-explanatory.
+
+
+