diff --git a/README.md b/README.md
new file mode 100644
index 0000000..abd3390
--- /dev/null
+++ b/README.md
@@ -0,0 +1,33 @@
+# Launcher_json
+
+Location of the launcher json needed for the launcher
+
+Contains the file itself and an application which retrieve the latest version of the file on the master branch at each request
+
+## The application
+
+The application retrieve the latest version of the file on the git server at each user request
+
+### Building the app
+
+To build the app, simply type in yout terminal: 
+
+`docker build -t launcher_json .`
+
+To run it, type:
+
+`docker run -p PORT:8080 -d --rm --name launcher_json`
+
+Replace `PORT` by the value you want to expose your app
+
+### Systemd service
+
+The repository contain a systemd service file launcher_json.service to place in `/etc/systemd/system` folder, then create the `launcher` user: 
+
+`adduser launcher --disabled-password --disabled-login --no-create-home` and `usermod -a -G docker launcher`
+
+Then activate the service using: 
+
+`systemctl enable --now launcher_json`
+
+Remember to build the application first !
\ No newline at end of file
diff --git a/application/launcher_json.service b/application/launcher_json.service
new file mode 100644
index 0000000..ee5d434
--- /dev/null
+++ b/application/launcher_json.service
@@ -0,0 +1,15 @@
+# systemd service, to start the app at the launch of the system and restart it if it crash
+[Unit]
+Description=Launcher_json Service
+
+[Service]
+# Non-root user, create a new user first and it to docker group
+User=launcher
+# Workspace directory
+# Path to Reposilite executable/script and its configuration.
+ExecStart=/usr/bin/docker run -p 8090:8080 --restart unless-stopped -d launcher_json
+# Policy
+Type=oneshot
+
+[Install]
+WantedBy=multi-user.target
diff --git a/launcher.json b/launcher.json
index b3dbf66..eb8954b 100644
--- a/launcher.json
+++ b/launcher.json
@@ -2,16 +2,16 @@
     "chapters": [
         {
             "title": "Testing 1.19.3",
-            "description": "Animals - 29092023",
+            "description": "Animals - 02102023",
             "minecraftVersion": "1.19.3",
             "type": "snapshot",
             "customVersion": "fabric-loader-0.14.22-1.19.3",
             "modspack": {
                 "mods": [
-                    "https://www.dropbox.com/scl/fi/oa8zdftqkp2qjrs5ba9fm/29092023.zip?rlkey=82a807t9bc5mpes6noypb36m0&dl=1"
+                    "https://www.dropbox.com/scl/fi/varyttpbg8tkwtqfq7172/02102023.zip?rlkey=ud4u4yezctbsnpv4g8rf40v7o&dl=1"
                 ],
                 "sha1sum": [
-                    "04446885775A370E1A5AF2D9FD0A3DCEC0BAB91E"
+                    "C32E603329977BA094692C020F066E029996979A"
                 ]
             },
             "java": {