Update README.md

Author: dogun-anduril

README.md

@@ -1,9 +1,45 @@
-# anduril-sdk-java
+# Anduril SDK Java
+
+The official [Anduril](https://www.anduril.com/) client library.
 
 ## Requirements
 
+Java 1.8 or later
+
 ## Installation
 
+### Gradle users
+
+Add this dependency and repository to your project's build.gradle
+
+```gradle
+dependencies {
+   implementation 'com.anduril:anduril-sdk-java:1.0'
+}
+
+repositories {
+   maven {
+        url = uri('https://maven.pkg.github.com/anduril/anduril-java')
+        credentials {
+            username = project.findProperty("gpr.user") ?: System.getenv("GITHUB_USERNAME")
+            password = project.findProperty("gpr.key") ?: System.getenv("GITHUB_TOKEN")
+        }
+    }
+}
+```
+
+### Maven users
+
+Add this dependency to your project's POM:
+
+```xml
+    <dependency>
+      <groupId>com.anduril</groupId>
+      <artifactId>anduril-sdk-java</artifactId>
+      <version>LATEST</version>
+    </dependency>
+```
+
 ## Usage
 
 ## Support