Docker image autodeploy using Travis (#47)

* Docker travis initial test

* Added build command

* Final version

.travis.yml

@@ -37,7 +37,10 @@ script:
 
 before_deploy:
   - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
+  - docker build -t thedaviddelta/lingva-translate .
 
 deploy:
   provider: script
   script: docker push thedaviddelta/lingva-translate
+  on:
+    branch: main