Update entrypoint.sh

entrypoint.sh

@@ -1,9 +1,15 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Start the backend server
+chmod +x /app/build/tanks.x86_64
+
+# Run xvfb and backend server
 xvfb-run -ae /dev/stdout \
     --server-args='-screen 0 640x480x24:32' \
-    /app/build/tanks.x86_64 -batchmode -nographics -logfile /app/logs/server.log &
+        /app/build/tanks.x86_64 \
+            -batchmode \
+            -nographics \
+            -logfile /dev/stdout &
 
 # Start Nginx
-exec nginx -g 'daemon off;'
+nginx -g 'daemon off;'