diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index fce2758..4c0a1d9 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -52,6 +52,15 @@ jobs:
           tags: |
             ${{ env.REGISTRY }}/frontend:latest
             ${{ env.REGISTRY }}/frontend:${{ gitea.sha }}
+          build-args: |
+            NEXT_PUBLIC_C2_URL=https://api.${{ secrets.DRB_DOMAIN }}
+            NEXT_PUBLIC_FIREBASE_API_KEY=${{ secrets.FIREBASE_API_KEY }}
+            NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN=${{ secrets.FIREBASE_AUTH_DOMAIN }}
+            NEXT_PUBLIC_FIREBASE_PROJECT_ID=${{ secrets.FIREBASE_PROJECT_ID }}
+            NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET=${{ secrets.FIREBASE_STORAGE_BUCKET }}
+            NEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID=${{ secrets.FIREBASE_MESSAGING_SENDER_ID }}
+            NEXT_PUBLIC_FIREBASE_APP_ID=${{ secrets.FIREBASE_APP_ID }}
+            NEXT_PUBLIC_FIRESTORE_DATABASE=${{ secrets.FIRESTORE_DATABASE }}
 
   deploy:
     name: Deploy to VM
diff --git a/drb-frontend/Dockerfile b/drb-frontend/Dockerfile
index e80dcbd..adfe3a3 100644
--- a/drb-frontend/Dockerfile
+++ b/drb-frontend/Dockerfile
@@ -4,6 +4,17 @@ WORKDIR /app
 COPY package.json ./
 RUN npm install
 COPY . .
+
+# Build-time public vars — baked into the Next.js bundle by the CI workflow
+ARG NEXT_PUBLIC_C2_URL
+ARG NEXT_PUBLIC_FIREBASE_API_KEY
+ARG NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN
+ARG NEXT_PUBLIC_FIREBASE_PROJECT_ID
+ARG NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET
+ARG NEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID
+ARG NEXT_PUBLIC_FIREBASE_APP_ID
+ARG NEXT_PUBLIC_FIRESTORE_DATABASE
+
 RUN npm run build
 
 FROM node:20-slim AS runner