Install Mono on Amazon Linux (CentOS too)

install-mono-amazon-linux.sh

sudo yum update -y

echo "======= INSTALLING RPM FOR MONO ======="
sudo mkdir -p /tmp/mono_dependencies
cd /tmp/mono_dependencies
sudo wget https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/Packages/l/libpng15-1.5.30-11.fc33.x86_64.rpm
sudo yum install -y libpng15-1.5.30-11.fc33.x86_64.rpm

echo "======= INSTALLING MONO ============"
sudo yum install -y yum-utils
sudo rpm --import "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF"
sudo yum-config-manager --add-repo http://download.mono-project.com/repo/centos/
sudo yum clean all
sudo yum makecache
sudo yum install -y mono-complete
sudo rm -rf /tmp/mono_deps 

echo "======= TESTING MONO ============"
cd ~
echo "using System; public class HelloWorld { static public void Main () { Console.WriteLine (\"ヅ Hello from Mono (hello.exe). Installation complete! ヅ\"); } }" > hello.cs
mcs hello.cs
mono hello.exe

Anyone got the latest wget link? Trying to do this for a piece of Uni coursework but the link they have provided us is outdated.