chore(ci): Streamline Drone CI configuration

This change simplifies the Drone CI configuration by removing redundant
steps and environment variables, enhancing the tagging strategy for
Docker images, and improving SSH key handling during deployment. Without
this change, the CI pipeline would be more complex and less efficient,
with potential issues in Docker image tagging and SSH key management.

- Remove unused 'environment' field from 'debug'

Signed-off-by: Glenn <glenux@glenux.net>

.drone.yml

@@ -6,8 +6,6 @@ name: default
 steps:
   - name: debug
     image: alpine
-    environment:
-
     commands:
       - 'echo "Repository: glenux/service-monica"'
       - 'echo "Git commit: ${DRONE_COMMIT_SHA:0:8}"'
@@ -25,24 +23,12 @@ steps:
         from_secret: DOCKERHUB_USERNAME
       password:
         from_secret: DOCKERHUB_PASSWORD
-      cache_from: "glenux/service-monica:latest_${DRONE_BRANCH/\\//-}"
+      cache_from: "glenux/service-monica:${DRONE_BRANCH/\\//-}_latest"
       repo: glenux/service-monica
-      tags: "${DRONE_COMMIT_SHA:0:8}"
-      purge: false
-
-  - name: publish:commit_branch
-    image: plugins/docker
-    # volumes:
-    #   - name: cache
-    #     path: /stupid
-    settings:
-      username:
-        from_secret: DOCKERHUB_USERNAME
-      password:
-        from_secret: DOCKERHUB_PASSWORD
-      cache_from: "glenux/service-monica:latest_${DRONE_BRANCH/\\//-}"
-      repo: glenux/service-monica
-      tags: "latest_${DRONE_BRANCH/\\//-}"
+      tags:
+        - "${DRONE_BRANCH/\\//-}_${DRONE_COMMIT_SHA:0:8}"
+        - "${DRONE_BRANCH/\\//-}_latest"
+        - "latest"
       purge: false
     when:
       branch:
@@ -50,21 +36,6 @@ steps:
         - "develop"
         - "feature/*"
 
-  - name: publish:latest
-    image: plugins/docker
-    settings:
-      username:
-        from_secret: DOCKERHUB_USERNAME
-      password:
-        from_secret: DOCKERHUB_PASSWORD
-      cache_from: "glenux/service-monica:latest_${DRONE_BRANCH/\\//-}"
-      repo: glenux/service-monica
-      tags: latest
-      purge: false
-    when:
-      branch:
-        - master
-
   - name: deploy:dokku
     image: alpine
     when:
@@ -85,12 +56,15 @@ steps:
       - mkdir -p ~/.ssh && chmod 700 ~/.ssh
       - echo "$SSH_PRIVATE_KEY" | base64 -d > ~/.ssh/deploy_key
       - chmod 600 ~/.ssh/deploy_key
-      - |
-        ssh -o StrictHostKeyChecking=no \
-            -i ~/.ssh/deploy_key \
-            "$SSH_USER@$SSH_HOST" \
-            git:from-image prm \
-                "glenux/service-monica:${DRONE_COMMIT_SHA:0:8}"
+      - ssh-keygen -f ~/.ssh/deploy_key -y > ~/.ssh/deploy_key.pub
+      - "cat ~/.ssh/deploy_key.pub | cut -f3 -d' '"
+      - ssh -o StrictHostKeyChecking=no
+          -i ~/.ssh/deploy_key
+          "$SSH_USER@$SSH_HOST"
+          git:from-image prm
+          "glenux/service-monica:${DRONE_BRANCH/\\//-}_${DRONE_COMMIT_SHA:0:8}"
+      #
+      - echo "SUCCESS"
 
 # volumes:
 #   - name: cache