Update README with setup instructions and access info

Added instructions for generating API key and running the application.

README.md

@@ -1,2 +1,18 @@
 # lol-banner-generator-tiktok
 fully vibecoded shit that works.
+
+# Instructions 1
+Generate your RIOT GAMES API KEY at https://developer.riotgames.com/
+
+# Instructions 2 :
+```
+git clone  https://github.com/Spleenftw/lol-banner-generator-tiktok
+cd lol-banner-generator-tiktok
+docker build -t lol-react-app .
+docker run -d -p 3002:3002 --name lol-app lol-react-app
+```
+
+# Access :
+Visit http://ipofthemachine:3002 and generate your own banner for tiktoks.
+
+<img width="1400" height="340" alt="kda-vs-1769096830501" src="https://github.com/user-attachments/assets/e07c77d4-9f74-4744-afd5-8f6221d65d75" />