README: document that the link alias exposes the URL as <alias>_URL #350
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Hello,
This has bit me several times. For example, Metabase expects the variable to be named
MB_DB_CONNECTION_URI, so I used-a MB_DB_CONNECTION_URIbut it exposed the URL asMB_DB_CONNECTION_URI_URL, which Metabase didn’t recognize. I’m not sure why there is this behavior, but if it’s better documented it can help more people.