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

@@ -1,7 +1,6 @@
-# Test building the code and docker image
 kind: pipeline
 type: docker
-name: test-build
+name: Tests
 
 steps:
 - name: go-test
@@ -32,11 +31,6 @@ steps:
   privileged: true
   settings:
     repo: git.faercol.me/faercol/public-ip-tracker
-    registry: git.faercol.me
-    tags: latest
-    username: faercol
-    password:
-      from_secret: GIT_PASSWORD
   depends_on:
     - go-test
     - go-build
@@ -45,24 +39,4 @@ steps:
 trigger:
   event:
     - push
-
-# On a tag, only build the related docker image
-kind: pipeline
-type: docker
-name: Release
-
-steps:
-- name: docker-push-tag
-    image: thegeeklab/drone-docker-buildx
-  privileged: true
-  settings:
-    registry: git.faercol.me
-    repo: git.faercol.me/faercol/public-ip-tracker
-    auto_tag: true
-    username: faercol
-    password:
-      from_secret: GIT_PASSWORD
-
-trigger:
-  event:
     - tag