Forked Deno Docker and Example

Forked from https://github.com/hayd/deno-docker

• Added .vscode/settings.json with deno extension config.
• Adjusted example and added docker instructions:

Build own container:

• make sure _entry.sh is in LF not CRLF info
• docker build -f alpine.dockerfile -t deno-alpine . (or user distribution)
• cd example
• docker build -t deno-example .
• docker run -d -p 8080:1993 deno-example