fix(docker): API URL as build arg

deploy/docker-compose.yml

@@ -36,9 +36,9 @@ services:
     build:
       context: ../frontend
       dockerfile: Dockerfile
-    container_name: codetutor-frontend
-    environment:
+      args:
         NEXT_PUBLIC_API_URL: https://codetutor-demo.kschappell.com
+    container_name: codetutor-frontend
     depends_on:
       - backend
     restart: unless-stopped

frontend/Dockerfile

@@ -14,6 +14,9 @@ COPY . .
 
 ENV NEXT_TELEMETRY_DISABLED=1
 
+ARG NEXT_PUBLIC_API_URL
+ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL
+
 RUN npm run build
 
 FROM base AS runner