Added app version to environment

.env

@@ -1,2 +1,3 @@
 REACT_APP_BROKER_URL=http://localhost:9000
-REACT_APP_ICE_SERVERS_URL=http://localhost:9000/iceservers
+REACT_APP_ICE_SERVERS_URL=http://localhost:9000/iceservers
+REACT_APP_VERSION=$npm_package_version

.env.production

@@ -1,2 +1,3 @@
 REACT_APP_BROKER_URL=https://broker.owlbear.app
-REACT_APP_ICE_SERVERS_URL=https://broker.owlbear.app/iceservers
+REACT_APP_ICE_SERVERS_URL=https://broker.owlbear.app/iceservers
+REACT_APP_VERSION=$npm_package_version

src/routes/Home.js

@@ -55,7 +55,7 @@ function Home() {
           Join Game
         </Button>
         <Text variant="caption" as="p" sx={{ textAlign: "center" }}>
-          Beta v1.5.0 (preview)
+          Beta v{process.env.REACT_APP_VERSION}
         </Text>
         <Button
           m={2}