Give `jobs` service internet access

.env.sample

@@ -7,8 +7,11 @@ LETS_ENCRYPT_ENV=production
 
 AWS_ACCESS_KEY_ID=ADD_ME
 AWS_SECRET_ACCESS_KEY=ADD_ME
-MANDRILL_APIKEY=ADD_ME
-MANDRILL_USERNAME=email@example.com
+SMTP_PASSWORD=ADD_ME
+SMTP_USER_USERNAME=email@example.com
+SMTP_DOMAIN=ADD_ME
+SMTP_HOST=mail.example.com
+SMTP_PORT=587
 PUSHER_SOCKET_URL=ws://ws.pusherapp.com/app/APP_ID
 PUSHER_URL=https://USER:PASS@api.pusherapp.com/apps/APP
 S3_KEY=ADD_ME

compose.yml

@@ -15,9 +15,11 @@ x-environment:
    - LANG=en_US.UTF-8
    - LOG_LEVEL=info
    - DOMAIN
-   - MAIL_DOMAIN
-   - MANDRILL_APIKEY
-   - MANDRILL_USERNAME
+   - SMTP_HOST
+   - SMTP_PORT
+   - SMTP_USERNAME
+   - SMTP_PASSWORD
+   - SMTP_DOMAIN
    - NEW_RELIC_LOG=stdout
    - PUSHER_SOCKET_URL
    - PUSHER_URL
@@ -66,6 +68,7 @@ services:
       - db
     networks:
       - internal
+      - proxy
     deploy:
       resources:
         limits: