Switch alpine to bssh like main.

beta/alpine-beta/Dockerfile

@@ -7,7 +7,7 @@ LABEL org.opencontainers.image.licenses="MIT"
 
 ENV OPENSIM_VERSION 0.9.2.1
 
-RUN apk add --no-cache curl uuidgen screen
+RUN apk add --no-cache bash curl uuidgen screen
 RUN apk add --no-cache mono --repository=https://dl-cdn.alpinelinux.org/alpine/edge/testing
 
 RUN mkdir /opt/opensim-tmp \

beta/alpine-beta/docker-entrypoint.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 set -Eeo pipefail
 
 chown -R $(id -u):$(id -g) defaults