feat(middleware): add a middleware to set the content-type to application/json

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## To be Released
 
+* feat(middleware): add a middleware to set the content-type to application/json
+
 ## v1.8.1
 
 * feat(errors): add bad request errors

content_type_middleware.go

@@ -0,0 +1,12 @@
+package handlers
+
+import (
+	"net/http"
+)
+
+var JSONContentTypeMiddleware = MiddlewareFunc(func(handler HandlerFunc) HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request, vars map[string]string) error {
+		w.Header().Set("Content-Type", "application/json")
+		return nil
+	}
+})