add endpoint to query blog article tags

Signed-off-by: Tobias Erbshäußer <tobias@tesoft.dev>

backend/main.go

@@ -50,6 +50,9 @@ func main() {
 	mux.Handle("POST /api/blog/{id}/unpublish", apiHandler.ProcessAuth(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
 		apiHandler.ServeBlogPostUnpublish(writer, request)
 	}), true))
+	mux.Handle("GET /api/blog/tags", apiHandler.ProcessAuth(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		apiHandler.ServeBlogTagsGet(writer, request)
+	}), false))
 	mux.HandleFunc("POST /api/login", func(writer http.ResponseWriter, request *http.Request) {
 		apiHandler.ServeLoginPost(writer, request)
 	})