couchdb是一个去sql的数据库软件包，由于服务器有些问题经常挂掉，网上大部分教程都无法安装。这里摘录官网的方法，亲测可用。
sudo apt update && sudo apt install -y curl apt-transport-https gnupg
curl https://couchdb.apache.org/repo/keys.asc | gpg --dearmor | sudo tee /usr/share/keyrings/couchdb-archive-keyring.gpg >/dev/null 2>&1
source /etc/os-release
echo "deb [signed-by=/usr/share/keyrings/couchdb-archive-keyring.gpg] https://apache.jfrog.io/artifactory/couchdb-deb/ ${VERSION_CODENAME} main" \
| sudo tee /etc/apt/sources.list.d/couchdb.list >/dev/null
sudo apt update
这里失败了不要慌，多试几次 sudo apt update 即可
sudo apt install -y couchdb
sudo apt install -y couchdb
接下来会出现安装选项，单机的话这样选即可
