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openssl req -x509 -out localhost.crt -keyout localhost.key \
-days 365 \
-newkey rsa:2048 -nodes -sha256 \
-subj '/CN=localhost' -extensions EXT -config <( \
printf "[dn]\nCN=localhost\n[req]\ndistinguished_name = dn\n[EXT]\nsubjectAltName=DNS:localhost\nkeyUsage=digitalSignature\nextendedKeyUsage=serverAuth")
server.js등을 만든 뒤 아래와 같은 코드를 만든다.