初始化一个 postgres 数据库，使用随机密码，并且将连接字符串打印到当前server的一个文件中

postgresInit.sh

#!/bin/bash

# 生成随机密码
POSTGRES_PASSWORD=$(openssl rand -base64 12)

# 数据库名称
DATABASE_NAME=server

# 创建 Docker 卷
docker volume create postgres_data

# 启动 PostgreSQL 容器
docker run --name my_postgres \
  -e POSTGRES_PASSWORD=$POSTGRES_PASSWORD \
  -e POSTGRES_DB=$DATABASE_NAME \
  -v postgres_data:/var/lib/postgresql/data \
  -p 5432:5432 -d postgres

# 输出连接字符串并保存到当前目录下的db_credentials.txt
echo "PostgreSQL has been started. Here is the connection string:" > db_credentials.txt
echo "postgresql://postgres:$POSTGRES_PASSWORD@<Your_Server_IP>:5432/$DATABASE_NAME" >> db_credentials.txt

echo "NOTE: Replace <Your_Server_IP> with your actual server IP address." >> db_credentials.txt

# 在终端显示密码文件已生成的消息
echo "Database credentials have been saved to db_credentials.txt in the current directory."