dockerfile. build image

Dockerfile

+FROM nginx:1.18-alpine
+COPY nginx.conf /etc/nginx/
+

docker-compose.yml

 services:
 
     reverse-proxy:
-        image: nginx:1.18-alpine
+        build:
+            context: .
+            dockerfile: Dockerfile
         volumes: 
             - ./sites/sites-available:/etc/nginx/conf.d
-            - ./nginx.conf:/etc/nginx/nginx.conf
         network_mode: host