Tavis-ci to upload images to the Docker hub, after succesfull tests.

For this to work, the following variables will need to be set at Docker hub:
 - DOCKER_ORG	first part of docker repo name (example: mailu)
 - DOCKER_UN	Docker-hub login username (private)
 - DOCKER_PW	Docker-hub login password (private)
Note that also Docker hub autobuilds will have to be disabled.

.travis.yml

@@ -11,3 +11,7 @@ script:
   - docker-compose -f tests/build.yml -p Mailu build
   - tests/compose/test-script.sh
 
+deploy:
+  provider: script
+  script: bash tests/deploy.sh
+

tests/build.yml

@@ -3,45 +3,45 @@ version: '3'
 services:
 
   front:
-    image: mailu/nginx:$VERSION
+    image: $DOCKER_ORG/nginx:$VERSION
     build: ../core/nginx
 
   imap:
-    image: mailu/dovecot:$VERSION
+    image: $DOCKER_ORG/dovecot:$VERSION
     build: ../core/dovecot
 
   smtp:
-    image: mailu/postfix:$VERSION
+    image: $DOCKER_ORG/postfix:$VERSION
     build: ../core/postfix
 
   antispam:
-    image: mailu/rspamd:$VERSION
+    image: $DOCKER_ORG/rspamd:$VERSION
     build: ../services/rspamd
 
   antivirus:
-    image: mailu/clamav:$VERSION
+    image: $DOCKER_ORG/clamav:$VERSION
     build: ../optional/clamav
 
   webdav:
-    image: mailu/radicale:$VERSION
+    image: $DOCKER_ORG/radicale:$VERSION
     build: ../optional/radicale
 
   admin:
-    image: mailu/admin:$VERSION
+    image: $DOCKER_ORG/admin:$VERSION
     build: ../core/admin
 
   roundcube:
-    image: mailu/roundcube:$VERSION
+    image: $DOCKER_ORG/roundcube:$VERSION
     build: ../webmails/roundcube
 
   rainloop:
-    image: mailu/rainloop:$VERSION
+    image: $DOCKER_ORG/rainloop:$VERSION
     build: ../webmails/rainloop
 
   fetchmail:
-    image: mailu/fetchmail:$VERSION
+    image: $DOCKER_ORG/fetchmail:$VERSION
     build: ../services/fetchmail
 
   none:
-    image: mailu/none:$VERSION
+    image: $DOCKER_ORG/none:$VERSION
     build: ../core/none

tests/deploy.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+docker login -u $DOCKER_UN -p $DOCKER_PW
+docker-compose -f tests/build.yml push