Updates to CLI README

convex-cli/README.md

@@ -12,6 +12,42 @@ The `convex-cli` module provides a CLI interface to Convex, including the abilit
 convex --help
 ```
 
+## Installation
+
+### Pre-requisites
+
+You need a reasonably modern version of Java, specifically 21+. You can get this here:
+- [Java JDK from Oracle](https://www.oracle.com/uk/java/technologies/downloads/)
+
+### .jar file
+
+You need the `convex-cii.jar` file. Released versions can be downloaded here:
+- https://mvnrepository.com/artifact/world.convex/convex-cli
+
+The `convex-cli.jar` file can also be generated by running `mvn install` in the root directory of the convex project, in which case the built `.jar` file can be found at `convex-cli/target/convex-cli.jar`
+
+At this point, assuming Java 21+ is correctly installed, you should simple be able to simply execute `java -jar convex-cli.jar`  (appending any appropriate CLI arguments).
+
+### Convenience Wrappers
+
+It is helpful to have a script or batch file which executes the Java command command for you so you can simply type `convex ....`
+
+For Windows PowerShell, the following should work:
+
+```
+# Windows powershell - convex.ps1
+java -jar path/to/convex-cli.jar $args
+```
+
+For Linux and other Unix-like systems:
+
+```
+#!/bin/bash
+java -jar path/to/convex-cli.jar $@
+```
+
+Ensure the wrapper is somewhere in your `$PATH`, and you should be good to go!
+
 ## License
 
 Copyright 2021-2024 The Convex Foundation and Contributors