How to fix SunCertPathBuilderException: unable to find valid certification path to requested target in MacOS

script.sh

# step 1
# execute the command to get the certificates
openssl s_client -showcerts -connect start.spring.io:443

# copy the lines stating in: Certificate chain (including this line)
# Ending in last -----END CERTIFICATE-----

# step 2
# create the cert file with this content
mkdir $HOME/certs
touch $HOME/certs/root.crt
vim $HOME/certs/root.crt
# paste the cert content

# step 3
# import the cert
$JAVA_HOME/bin/keytool -importcert -alias your-alias -keystore $JAVA_HOME/jre/lib/security/cacerts -storepass changeit -file $HOME/certs/root.crt