Update README.md

README.md

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-# citra-multiplayer-dedicated
+# Citra Multiplayer Dedicated Lobby
+
+Quickly stand up new dedicated multiplayer lobbies that will be broadcasted on Citra.
+
+## Usage
+```
+sudo docker run -d \
+  --publish 5000:5000/udp
+  citraemu/citra-multiplayer-dedicated \
+  --room-name "Dedicated (REGION) - GAME TITLE" \
+  --preferred-game "GAME TITLE" \
+  --preferred-game-id "TITLE ID" \
+  --port 5000 \
+  --max_members 4 \
+  --username "CITRA ACCOUNT USERNAME"
+  --token "CITRA ACCOUNT TOKEN" \
+  --announce-url https://api.citra-emu.org/lobby
+```