README.md results in syntax error

[dancesWithCycles]

Hi folks,
Thank you so much for providing and maintaining this repository.

I installed libressl according to the README.md. That worked out I guess.

According to the README.md I am installing required modules. That results in syntax errors. Please see yourself.

oatpp-example-libressl$ ./utility/install-oatpp-modules.sh 
./utility/install-oatpp-modules.sh: 17: Syntax error: "(" unexpected

oatpp-example-libressl$ ./utility/install-oatpp-modules.sh oatpp
./utility/install-oatpp-modules.sh: 17: Syntax error: "(" unexpected

I appreciate any clue on this matter. Cheers!

[dancesWithCycles]

In this repository I am facing the same syntax error:

oatpp-example-crud$ ./utility/install-oatpp-modules.sh 
./utility/install-oatpp-modules.sh: 17: Syntax error: "(" unexpected

[dancesWithCycles]

Hi folks,
you can run the ./utility/install-oatpp-modules.sh script with the bash shell (at least on Debian). The default sh shell in Debian is not working.

bash ./utility/install-oatpp-modules.sh

So, shall we switch from

#!/bin/sh

to

#!/bin/bash

or shall we update the README.md files to remind people to chose the corresponding shell on the development host?

Cheers!