Add ghost client interface

frontend/ghost/data.go

@@ -0,0 +1,9 @@
+package ghost
+
+// Pages are ghost pages data
+type Pages struct {
+}
+
+// Posts are ghost posts data
+type Posts struct {
+}

frontend/ghost/ghost.go

@@ -0,0 +1,8 @@
+package ghost
+
+// Client is the ghost backend client
+type Client interface {
+	GetPosts(params ...QueryParam) (posts *Posts, err error)
+	GetPostBySlug(slug string, params ...QueryParam) (posts *Posts, err error)
+	GetPageBySlug(slug string) (pages *Pages, err error)
+}

frontend/ghost/params.go

@@ -0,0 +1,10 @@
+package ghost
+
+import (
+	"github.com/valyala/fasthttp"
+)
+
+// QueryParam is the generic query param applier
+type QueryParam interface {
+	Apply(headers *fasthttp.RequestHeader, args *fasthttp.Args)
+}