fickit: Check vault binary presence

configs/gen_metadata.sh

@@ -7,6 +7,8 @@ escape_newline () {
     sed 's/$/\\n/g' | tr -d '\n'
 }
 
+which vault > /dev/null 2> /dev/null || { echo "Please install vault" >&2; exit 1; }
+
 export VAULT_ADDR="${VAULT_ADDR:-"https://vault.srs.epita.fr:443"}"
 SSH_PATH="${SSH_PATH:-/tmp/fic_ssh}"
 DHPARAM_PATH="${DHPARAM_PATH:-/tmp/dhparam.pem}"