Add host alias to match OSX

On docker for mac you can use `host.docker.internal` to access host
network. Add this alias so it will work on linux as well (development
docker-compose only).

Author: Vidas P

docker/docker-compose.local.yml

@@ -15,6 +15,8 @@ services:
       - 5432:5432
 
   active_workflow_web:
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
     build:
       context: ../
       dockerfile: Dockerfile
@@ -33,6 +35,8 @@ services:
     command: /scripts/init
 
   active_workflow_scheduler:
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
     build:
       context: ../
       dockerfile: Dockerfile
@@ -49,6 +53,8 @@ services:
     command: bundle exec rails runner bin/scheduler.rb
 
   active_workflow_worker:
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
     build:
       context: ../
       dockerfile: Dockerfile