Replace bash with /bin/sh

CHANGELOG.md

@@ -15,6 +15,9 @@
 - improve filtermail checks for encrypted messages and drop support for unencrypted MDNs
   ([#320](https://github.com/deltachat/chatmail/pull/320))
 
+- replace `bash` with `/bin/sh`
+  ([#334](https://github.com/deltachat/chatmail/pull/334))
+
 ## 1.3.0 - 2024-06-06
 
 - don't check necessary DNS records on cmdeploy init anymore

scripts/cmdeploy

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 #
 # Wrapper for cmdelpoy to run it in activated virtualenv.
 set -e

scripts/dovecot/build-obs.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # Install dependencies
 echo "Installing dependencies for this script:"

scripts/initenv.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 set -e
 python3 -m venv --upgrade-deps venv