Update README.md

README.md

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 # Kroces-Modpack-
-Modpack for a server
+Modpack for a server KROCES.
+
+### How to install the modpack ?
+- Install the [CurseForge application](https://www.curseforge.com/).
+- Download the latest version in the [Releases](https://github.com/Steve557mag-fr/Kroces-Modpack-/releases)
+- Make sure you don't have any other version on Curseforge
+- Press the "import" button on the "modpack" section on Curseforge
+- Select the downloaded archive.
+
+
+### How to play on the modpack ?
+- Press "Play" on the modpack.