Now supports running under a sub path

Just set the SPOOLMAN_BASE_PATH environment variable and it should work.

Resolves #95

client/src/i18n.ts

@@ -2,6 +2,7 @@ import i18n from "i18next";
 import detector from "i18next-browser-languagedetector";
 import Backend from "i18next-xhr-backend";
 import { initReactI18next } from "react-i18next";
+import { getBasePath } from "./utils/url";
 
 interface Language {
   name: string;
@@ -106,7 +107,7 @@ i18n
   .init({
     supportedLngs: Object.keys(languages),
     backend: {
-      loadPath: "/locales/{{lng}}/{{ns}}.json",
+      loadPath: getBasePath() + "/locales/{{lng}}/{{ns}}.json",
     },
     defaultNS: "common",
     fallbackLng: "en",