docker and workflow fixed for runtime VAPID

.github/workflows/deploy-ec2.yml

@@ -37,6 +37,8 @@ jobs:
           tags: ${{ env.IMAGE_NAME }}:latest
           cache-from: type=gha
           cache-to: type=gha,mode=max
+          build-args: |
+            NEXT_PUBLIC_VAPID_PUBLIC_KEY=${{ secrets.NEXT_PUBLIC_VAPID_PUBLIC_KEY }}
 
       - name: Save application image
         run: |

Dockerfile

@@ -12,6 +12,10 @@ RUN npm ci && npx prisma generate
 # Copy application code
 COPY . .
 
+# Build-time env vars (NEXT_PUBLIC_* are embedded into the JS bundle)
+ARG NEXT_PUBLIC_VAPID_PUBLIC_KEY
+ENV NEXT_PUBLIC_VAPID_PUBLIC_KEY=$NEXT_PUBLIC_VAPID_PUBLIC_KEY
+
 # Build the Next.js application
 RUN npm run build