Taken from https://myopswork.com/how-to-do-end-to-end-encryption-of-data-in-transit-b-w-aws-alb-and-ec2-3b7fd917cddd but fixed minor issues

bootstrap-nginx-with-certs.sh

#!/bin/bash

domain=$(uname -n)
echo "Generating SSL for $domain"
commonname=$domain
country=UK
state=EGG
locality=EGG
organization=Urmum
organizationalunit=Urmum-1
email=egg@egg.com


#Optional
password=dummypassword


echo "Generating key request for $domain"

mkdir -p /etc/ssl/private
chmod 700 /etc/ssl/private
cd /etc/ssl/private

#Generate a key
openssl genrsa -des3 -passout pass:$password -out $domain.key 2048 -noout

#Remove passphrase from the key. Comment the line out to keep the passphrase
echo "Removing passphrase from key"
openssl rsa -in $domain.key -passin pass:$password -out $domain.key

#Create the request
echo "Creating CSR"
openssl req -new -key $domain.key -out $domain.csr -passin pass:$password \
            -subj "/C=$country/ST=$state/L=$locality/O=$organization/OU=$organizationalunit/CN=$commonname/emailAddress=$email"

mkdir -p /etc/ssl/certs
cd /etc/ssl/certs
openssl x509 -req -days 1 -in /etc/ssl/private/$domain.csr -signkey /etc/ssl/private/$domain.key -out $domain.crt


#openssl dhparam -out /etc/ssl/certs/dhparam.pem 2049

mkdir -p /tmp/rpms
cd /tmp/rpms
wget https://nginx.org/packages/rhel/7/x86_64/RPMS/nginx-1.8.0-1.el7.ngx.x86_64.rpm
yum -y localinstall nginx-1.8.0-1.el7.ngx.x86_64.rpm

cat <<EOF > /etc/nginx/conf.d/ssl.conf
server {
    listen 443 ssl;
        listen [::]:443 ssl;
            server_name $domain;
                ssl_certificate /etc/ssl/certs/$domain.crt;
                    ssl_certificate_key /etc/ssl/private/$domain.key;
                        #ssl_dhparam /etc/ssl/certs/dhparam.pem;
                            ########################################################################
                                # from https://cipherli.st/                                            #
                                    # and https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html #
                                        ########################################################################
                                            ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
                                                ssl_prefer_server_ciphers on;
                                                    ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH";
                                                        ssl_ecdh_curve secp384r1;
                                                            ssl_session_cache shared:SSL:10m;
    ssl_session_tickets off;
    ssl_stapling on;
    ssl_stapling_verify on;
    resolver 8.8.8.8 8.8.4.4 valid=300s;
    resolver_timeout 5s;
    # Disable preloading HSTS for now.  You can use the commented out header line that includes
    # the "preload" directive if you understand the implications.
    #add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
    add_header Strict-Transport-Security "max-age=63072000; includeSubdomains";
    add_header X-Frame-Options DENY;
    add_header X-Content-Type-Options nosniff;
    ##################################
    # END https://cipherli.st/ BLOCK #
    ##################################
   root /usr/share/nginx/html;
    location / {
    }
    error_page 404 /404.html;
    location = /404.html {
    }
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
    }
}
EOF
systemctl start nginx
systemctl status nginx
systemctl enable nginx