diff --git a/Dockerfile b/Dockerfile
index e555dd4..7646910 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,7 @@
-FROM docker.m.daocloud.io/library/node:21-alpine
+FROM dnode:21-alpine
 RUN apk add --no-cache bash
 WORKDIR /app
 COPY package*.json ./
-RUN npm config set registry https://registry.npmmirror.com/
 RUN npm install
 COPY . .
 EXPOSE 3000
diff --git a/src/utils/api.js b/src/utils/api.js
index e93c237..88d988d 100644
--- a/src/utils/api.js
+++ b/src/utils/api.js
@@ -8,12 +8,11 @@
 
 import { getAccessTokenGlobal } from '../components/AuthProvider';
 
-// Backend host: use CRA env var REACT_APP_BACKEND_HOST, or default to localhost.
 let _backendHost = null;
 
 export function getBackendHost() {
     if (_backendHost !== null) return _backendHost;
-    _backendHost = process.env.REACT_APP_BACKEND_HOST || 'http://localhost:8000';
+    _backendHost = process.env.DIALECTIC_REACT_APP_BACKEND_HOST || 'http://localhost:8000';
     return _backendHost;
 }
 
@@ -21,14 +20,8 @@ export function setBackendHost(host) {
     _backendHost = host;
 }
 
-/**
- * Thin wrapper around fetch() that checks for the 503 "not configured"
- * response and fires a global event when detected.
- */
 export async function apiFetch(path, options = {}) {
     const url = path.startsWith('http') ? path : `${getBackendHost()}${path}`;
-
-    // Attach Authorization header when a token is available
     const token = getAccessTokenGlobal();
     if (token) {
         options.headers = { ...options.headers, Authorization: `Bearer ${token}` };