diff --git a/README.md b/README.md
index d6d6370..b6f1b8f 100644
--- a/README.md
+++ b/README.md
@@ -6,11 +6,41 @@ Collection of Dockerfiles created to build & pack various tools.
-- [1. Tools](#1-tools)
+- [1. How to use](#1-how-to-use)
+ - [1.1. CLI](#11-cli)
+- [2. Tools](#2-tools)
-# 1. Tools
+# 1. How to use
+
+Run the build-script `script/build.sh` with the path to the tool you want to build.
+
+
+
+The docker-image will be tagged with `default` and the detected version/commit-hash.
+
+You can add more tags or change the existing tag-naming-scheme using the environment-variable `TAG`.
+
+
+
+## 1.1. CLI
+
+`script/build.sh [extra-args for docker build ..]`
+
+
+
+### 1.1.1. Environment-Variables
+
+Variable | Description | Default
+-|-|-
+`TAG` | Tag for Docker-building | `TAGPREFIX` + `NAME`
+`TAGPREFIX` | Set a prefix to the default-tag | -
+`NAME` | Change the name used in the tag | *FolderName*
+
+
+
+# 2. Tools
Nothing yet