Add 1-minute tutorial: Prelude

.bach/run

@@ -1 +1,2 @@
+# Run an arbitrary application via the command-line: NAME [ARGS...]
 .bach/src/run.bach/run/bach/internal/RunTool.java

README.md

@@ -6,6 +6,37 @@
 
 Bach is a Java Shell-like that orchestrates [JDK tools] for building modular Java projects.
 
+## Prelude
+
+Install Bach's basic tool framework using its sources via `git` and Java 22 or higher.
+
+First time:
+```shell
+mkdir myproject
+cd myproject
+git init
+git submodule add https://github.com/sormuras/run.bach .bach/src/run.bach/run/bach
+echo .bach/src/run.bach/run/bach/internal/RunTool.java > .bach/run
+```
+
+Subsequent times:
+```shell
+cd myproject
+git submodule update --remote --recursive
+```
+
+Run time:
+```shell
+java @.bach/run jar --version
+java @.bach/run java --version
+java @.bach/run https://raw.githubusercontent.com/sormuras/hello/main/Hello.java World
+java @.bach/run https://github.com/sormuras/hello/releases/download/1-M3/hello-1-M3.jar World
+```
+Consult the following manual pages for details of `git` and `java` tools:
+- [git init](https://git-scm.com/docs/git-init) - Create an empty Git repository or reinitialize an existing one
+- [git submodule](https://git-scm.com/docs/git-submodule) - Initialize, update or inspect submodules
+- [java @file](https://docs.oracle.com/en/java/javase/22/docs/specs/man/java.html#java-command-line-argument-files) - Java Command-Line Argument Files
+
 # be free - have fun
 
 [![jdk22](https://img.shields.io/badge/JDK-22-blue.svg)](https://jdk.java.net)