Fixup documentation

- better gomarkdown generation that now fixed the escaped strings, no
  need to use pandoc anymore
- added workflow image
- upgraded versions of mkdocs requirements

doc/docs/packages/parser.md

@@ -2,19 +2,18 @@
 
 # parser
 
-``` go
+```go
 import "katenary/parser"
 ```
 
-Parser package is a wrapper around compose-go to parse compose files.
+Parser package is a wrapper around compose\-go to parse compose files.
 
-## func Parse
+## func [Parse](<https://github.com/metal3d/katenary/blob/develop/parser/main.go#L10>)
 
-``` go
+```go
 func Parse(profiles []string, dockerComposeFile ...string) (*types.Project, error)
 ```
 
-Parse compose files and return a project. The project is parsed with
-dotenv, osenv and profiles.
+Parse compose files and return a project. The project is parsed with dotenv, osenv and profiles.
 
-Generated by [gomarkdoc](https://github.com/princjef/gomarkdoc)
+Generated by [gomarkdoc](<https://github.com/princjef/gomarkdoc>)