Update README.md for Docker Compose v2

Add transparent background for text box

Show mouse position as maidenhead locator also

add a missing space to a db call

remove ws server url and external port

Add missing code backtick in README

Add missing code backtick

This was causing the code blocks and explanatory text to be the reverse of what was intended.

Python3 port

Update README.md

Fix missing altitude on popup

Altitude label is missing on the station dialog popup.  It is sometimes present in the packet data even on stations that are not moving.

Added ENCODING 'UTF8'; in the CREATE DATABASE statement for new installs of Postgres which may default to use ascii as the character set.

there is some weird issue with thoses SVG that makes imagick chokes on them... they have been "optimized" and now works