api: Add go files

I know this is a huge commit, but I can't be bothered to check
this in part by part.

api/router.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"github.com/gorilla/handlers"
+	"github.com/gorilla/mux"
+	"net/http"
+	"os"
+)
+
+func serveRoutes() error {
+	router := mux.NewRouter()
+
+	if err := initAPIRouter(router); err != nil {
+		return err
+	}
+
+	if err := initStaticRouter(router); err != nil {
+		return err
+	}
+
+	origins := handlers.AllowedOrigins([]string{"*"})
+	headers := handlers.AllowedHeaders([]string{"X-Requested-With"})
+	methods := handlers.AllowedMethods([]string{"GET", "POST"})
+
+	logger.Infof("starting server on port %s\n", os.Getenv("PORT"))
+	if err := http.ListenAndServe(":"+os.Getenv("PORT"), handlers.CORS(origins, headers, methods)(router)); err != nil {
+		logger.Errorf("cannot start server: %v", err)
+		return err
+	}
+
+	return nil
+}