fix(ci): add credentials to drone pipeline

.drone.yml

@@ -3,12 +3,8 @@ kind: pipeline
 type: docker
 name: default
 environment:
-  CI_REGISTRY: "git.valvin.fr"
-  CI_REGISTRY_USER: "valvin"
   CI_REGISTRY_IMAGE: "git.valvin.fr/valvin/gemini-agate-image"
   IMAGE_TAG: "latest"
-  CI_REGISTRY_PASSWORD:
-    from_secret: CI_REGISTRY_PASSWORD
 
 steps:
 - name: test_build_image
@@ -21,6 +17,13 @@ steps:
     - pull_request
 - name: build_image_and_push
   image: gcr.io/kaniko-project/executor:v1.7.0-debug
+  environment:
+    CI_REGISTRY:
+      from_secret: registry_url
+    CI_REGISTRY_USER:
+      from_secret: registry_user
+    CI_REGISTRY_PASSWORD:
+      from_secret: registry_password
   commands:
   - echo "init registry credentials"
   - echo $DRONE_WORKSPACE

README.md

@@ -1,5 +1,7 @@
 # Gemini Agate Image
 
+[![Build Status](https://drone.valvin.fr/api/badges/valvin/gemini-agate-image/status.svg)](https://drone.valvin.fr/valvin/gemini-agate-image)
+
 This image allowes to publish static content locate in a git repository on [Gemini](https://gemini.circumlunar.space/). Based on [Agate](https://github.com/mbrubeck/agate) gemini server.
 
 This images takes these environment variables: