Move environment variables to middleware. Closes #972.

next.config.js

@@ -1,14 +1,9 @@
 require('dotenv').config();
 const pkg = require('./package.json');
 
-const scriptName = process.env.TRACKER_SCRIPT_NAME;
-
 module.exports = {
   env: {
     VERSION: pkg.version,
-    FORCE_SSL: Boolean(process.env.FORCE_SSL),
-    DISABLE_LOGIN: Boolean(process.env.DISABLE_LOGIN),
-    TRACKER_SCRIPT_NAME: scriptName,
   },
   basePath: process.env.BASE_PATH,
   eslint: {
@@ -23,13 +18,10 @@ module.exports = {
 
     return config;
   },
-  async rewrites() {
-    return scriptName ? [{ source: `/${scriptName}.js`, destination: '/umami.js' }] : [];
-  },
   async headers() {
     return [
       {
-        source: `/${scriptName || 'umami'}.js`,
+        source: `/umami.js`,
         headers: [
           {
             key: 'Cache-Control',