2021-01-13 Version 1.0.0: Updated installation info in README.md

Author: fartem

README.md

@@ -19,6 +19,14 @@ Custom Checkstyle checks for Android projects.
 
 ### Gradle
 
+Add `https://jitpack.io` as Maven repository to `build.gradle` (needs for downloading dependencies from GitHub):
+
+```groovy
+repositories {
+    maven { url "https://jitpack.io" }
+}
+```
+
 If you are using [Checkstyle plugin](https://docs.gradle.org/current/userguide/checkstyle_plugin.html) for Gradle, add
 checks project as dependency in the `dependencies` section in the `build.gradle`: