Move NODE_ENV from docker-compose

Dockerfile

@@ -8,6 +8,8 @@ RUN npm install --omit=dev
 
 COPY . .
 
+ENV NODE_ENV=production
+
 # Build without type checking, as we have removed the Typescript
 # dev-dependencies above to save space in the final build
 RUN npx tsc --noCheck

docker-compose.yml

@@ -5,8 +5,6 @@ services:
     restart: always
     ports:
       - ${PORT}:3000
-    environment:
-      - NODE_ENV=production
     env_file:
       - .env
     healthcheck: