diff --git a/.github/workflows/production.yml b/.github/workflows/production.yml
index 5c62a3d..dbae9f5 100644
--- a/.github/workflows/production.yml
+++ b/.github/workflows/production.yml
@@ -32,6 +32,12 @@ jobs:
           tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+          build-args: |
+            VITE_API_BASE_URL="https://api.chess-scribe.org/api/v1"
+            VITE_MATOMO_URL="https://analytics.owenrees.eu"
+            VITE_MATOMO_SITE_ID="3"
+            VITE_MAINTENANCE_MODE="true"
+            VITE_MAINTENANCE_MODE_MESSAGE="ChessScribe is currently undergoing maintenance. Some features may be unavailable."
 
   deploy:
     needs: publish
diff --git a/Dockerfile b/Dockerfile
index d98e063..71f120a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,20 @@
 FROM node:24-alpine AS builder
 WORKDIR /app
 
+# 1. Declare the build-time arguments Vite needs
+ARG VITE_API_BASE_URL
+ARG VITE_MATOMO_URL
+ARG VITE_MATOMO_SITE_ID
+ARG VITE_MAINTENANCE_MODE
+ARG VITE_MAINTENANCE_MODE_MESSAGE
+
+# 2. Assign them to environment variables so Vite detects them
+ENV VITE_API_BASE_URL=$VITE_API_BASE_URL
+ENV VITE_MATOMO_URL=$VITE_MATOMO_URL
+ENV VITE_MATOMO_SITE_ID=$VITE_MATOMO_SITE_ID
+ENV VITE_MAINTENANCE_MODE=$VITE_MAINTENANCE_MODE
+ENV VITE_MAINTENANCE_MODE_MESSAGE=$VITE_MAINTENANCE_MODE_MESSAGE
+
 COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
 RUN corepack enable pnpm && pnpm i --frozen-lockfile
 COPY . .