Improve CI

Add more tests to the CI, including a docker build test, and add the
generation and publication of a new docker image on master and tags

.drone.yml

@@ -3,23 +3,38 @@ type: docker
 name: Tests
 
 steps:
-- name: Go tests
+- name: go-test
   image: golang
   commands:
   - make -C tracker test
+  depends_on:
 
-- name: Go build
+- name: go-build
   image: golang
   commands:
   - make -C tracker build
+  depends_on:
 
-- name: Docker build
+- name: docker-build
   image: thegeeklab/drone-docker-buildx
   privileged: true
   settings:
+    repo: git.faercol.me/faercol/public-ip-tracker
+    tags: latest
     platforms:
       - linux/amd64
       - linux/arm64
+  depends_on:
+
+- name: docker-push
+  image: thegeeklab/drone-docker-buildx
+  privileged: true
+  settings:
+    repo: git.faercol.me/faercol/public-ip-tracker
+  depends_on:
+    - go-test
+    - go-build
+    - docker-build
 
 trigger:
   event: