examples: Favor configs over builds

There doesn't seem to be a need to prefer building custom containers,
just to add a config file, a need that is easily solved with compose
configs. Configs are still managed through git, just no new container
needs to be built, slightly simplifying things.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>

.examples/docker-compose/insecure/postgres/fpm/docker-compose.yml

@@ -28,7 +28,7 @@ services:
       - redis
 
   web:
-    build: ./web
+    image: nginx:alpine
     restart: always
     ports:
       - 127.0.0.1:8080:80
@@ -36,6 +36,9 @@ services:
       - nextcloud:/var/www/html:z,ro
     depends_on:
       - app
+    configs:
+      - source: web
+        target: /etc/nginx/nginx.conf
 
   cron:
     image: nextcloud:fpm-alpine
@@ -47,6 +50,11 @@ services:
       - db
       - redis
 
+configs:
+  web:
+    file: nginx.conf
+
+
 volumes:
   db:
   nextcloud:

.examples/docker-compose/insecure/postgres/fpm/web/Dockerfile

@@ -1,3 +0,0 @@
-FROM nginx:alpine
-
-COPY nginx.conf /etc/nginx/nginx.conf