add support for env config.

config.js

@@ -1,6 +1,6 @@
 const fs = require("fs")
 
-const config = {
+let config = {
   graphqlEndpoint: "http://127.0.0.1:17000/graphql",
   playgroundEndpoint: "http://127.0.0.1:17000/playground",
   port: 8080,
@@ -35,6 +35,31 @@ if (typeof(window) !== "undefined") {
   delete config.redis
   delete config.backend
 } else {
+  config = {
+    graphqlEndpoint: process.env.RPDATA_API_GRAPHQL || "http://127.0.0.1:17000/graphql",
+    playgroundEndpoint: process.env.RPDATA_API_PLAYGROUND || "http://127.0.0.1:17000/playground",
+    port: Number(process.env.PORT || "8080"),
+    root: process.env.ROOT || "http://localhost:8080",
+    trustedProxy: process.env.TRUSTED_PROXY || null,
+    auth0: {
+      secret: process.env.AUTH0_SECRET || "INVALID_SECRET",
+      clientId: process.env.AUTH0_CLIENT_ID || "",
+      domain: process.env.AUTH0_DOMAIN || "aiterp.eu.auth0.com",
+    },
+    session: {
+      secret: process.env.SESSION_SECRET || "",
+      secure: process.env.SESSION_SECURE === "true",
+    },
+    redis: {
+      host: process.env.REDIS_HOST || "127.0.0.1",
+      port: process.env.REDIS_PORT || 6379,
+    },
+    backend: {
+      kid: process.env.RPDATA_KID || "",
+      secret: process.env.RPDATA_SECRET || "",
+    }
+  }
+
   try {
     const data = fs.readFileSync("/etc/aiterp/rpdata-frontend.json", "utf8")
     const parsed = JSON.parse(data)