complete docker-compose.yml for [snapdrop]

[chendelin1982]

What type of your feature request?

• official architecture research
• test offcial docker
• complete standardized expression
• developer test and running
• specials and refers at notes.md/.env/docker-compose.yml
• contentful
• test at Appstore and nginx proxy testing
• docs
• siteurl or baseurl
• more environments from
• connetion URI
• ports
• credentials environment
• i18n
• other