Add vader tests and docker setup

test/vimrc

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+source /rtp.vim
+set runtimepath+=/vader
+
+" vint: -ProhibitSetNoCompatible
+set nocompatible
+filetype plugin indent on
+syntax enable
+
+" default syntax
+let vimwiki_default = {}
+let vimwiki_default.path = '~/vimwiki/default'
+let vimwiki_default.path_html = '~/vimwiki/default/html'
+let vimwiki_default.syntax = 'default'
+let vimwiki_default.ext = '.wiki'
+let vimwiki_default.name = 'DefaultSyntax'
+
+" markdown syntax - https://github.github.com/gfm/
+let vimwiki_markdown = {}
+let vimwiki_markdown.path = '~/vimwiki/markdown'
+let vimwiki_markdown.path_html = '~/vimwiki/markdown/html'
+let vimwiki_markdown.syntax = 'markdown'
+let vimwiki_markdown.ext = '.md'
+let vimwiki_markdown.name = 'MarkdownSyntax'
+
+" mediawiki syntax - https://www.mediawiki.org/wiki/Help:Formatting
+let vimwiki_mediawiki = {}
+let vimwiki_mediawiki.path = '~/vimwiki_mediawiki'
+let vimwiki_mediawiki.path_html = '~/vimwiki/mediawiki/html'
+let vimwiki_mediawiki.syntax = 'mediawiki'
+let vimwiki_mediawiki.ext = '.mw'
+let vimwiki_mediawiki.name = 'MediaWikiSyntax'
+
+" register the 3 wikis
+let g:vimwiki_list = [vimwiki_default, vimwiki_markdown, vimwiki_mediawiki]