Use nixos-compatible shebang in run script

Dockerfile

@@ -18,6 +18,8 @@ FROM mcr.microsoft.com/dotnet/core/runtime-deps
 RUN apt-get update \
     && apt-get -y install --no-install-recommends \
         ffmpeg \
+        libegl1-mesa-dev \
+        libgbm1 \
         libgl1 \
         pulseaudio \
     && rm -rf /var/lib/apt/lists/*

run.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 function set_latency_offset() {
 	if [ $# != 1 ]; then
 		return 1