use Dockerfile.apache by default

In docker-compose, using a symlink from ./Dockerfile
to contrib/docker/Dockerfile.apache does not work. Therefore the symlink
is deleted and the docker-compose.yml is instructed to use the file
Dockerfile.apache in contrib by default.

Dockerfile

@@ -1 +0,0 @@
-contrib/docker/Dockerfile.apache

docker-compose.yml

@@ -14,7 +14,10 @@ services:
 
   app:
     # Comment to use dockerhub image
-    build: .
+    build:
+      context: .
+      dockerfile: contrib/docker/Dockerfile.apache
+      #dockerfile: contrib/docker/Dockerfile.fpm
     image: pixelfed
     restart: unless-stopped
     ## If you have a traefik running, uncomment this to expose Pixelfed
@@ -36,7 +39,10 @@ services:
 
   worker:  # Comment this whole block if HORIZON_EMBED is true.
     # Comment to use dockerhub image
-    build: .
+    build:
+      context: .
+      dockerfile: contrib/docker/Dockerfile.apache
+      #dockerfile: contrib/docker/Dockerfile.fpm
     image: pixelfed
     restart: unless-stopped
     env_file: