build.entrypoint.sh: use POSIX sh

-e not in the shebang as it is ignored when launched with `sh` directly

Signed-off-by: Filip Kobierski <fkobi@fsfe.org>

build.Dockerfile

@@ -30,6 +30,6 @@ COPY build.entrypoint.sh ./
 # Set the workdir
 WORKDIR /website-source
 
-ENTRYPOINT ["bash", "/website-source-during-build/build.entrypoint.sh"]
+ENTRYPOINT ["sh", "/website-source-during-build/build.entrypoint.sh"]
 
 

build.entrypoint.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 set -e
 # Ran by dockerfile as entrypoint
 # Ran from the volume of the website source mounted at /website-source