new styling for frontpage, update login and authorize templates (#46)

* new styling for frontpage, update login and authorize templates

* run go fmt

* add AssetBaseDir to command flag parsing

* untested: move landing page to it's own router

* go fmt, fix typo

* fix package, adapt to proper Route structure

internal/config/template.go

@@ -22,4 +22,6 @@ package config
 type TemplateConfig struct {
 	// Directory from which gotosocial will attempt to load html templates (.tmpl files).
 	BaseDir string `yaml:"baseDir"`
+	// Directory from which static files are served
+	AssetBaseDir string `yaml:"assetDir"`
 }