Adapted from https://github.com/CptOfEvilMinions/BlogProjects/Docker-vault. Change consists in running the vault server using TLS certificates

1. store the TLS certificate chain (server certificates + chain of intermediate CAs) under ./conf/vault/cert.pem
2. store the corressponding TLS key under ./conf/vault/key.pem. The key must NOT be encrypted then docker-compose up -build