feat: automatic releases on merge to main

- Drone now triggers on push to main branch instead of Git tags
- Each merge produces two Docker tags: main-{commit-sha} and main-latest
- No manual Git tags needed — merging PR develop → main is the release
- Updated docs/DEVELOPMENT.md with new Git-flow workflow
- Updated CHANGELOG.md with automatic releases feature

.drone.yml

@@ -4,7 +4,7 @@ name: build-and-push
 
 trigger:
   event:
-    - tag
+    - push
     - pull_request
 
 steps:
@@ -24,11 +24,11 @@ steps:
       context: .
       registry: gitea.jambotron.com
       repo: gitea.jambotron.com/liosha84/htop-web
-      auto_tag: true
+      tags: ${DRONE_COMMIT_SHA:0:7},main-latest
       username:
         from_secret: REGISTRY_USERNAME
       password:
         from_secret: REGISTRY_PASSWORD
       when:
-        event:
-          - tag
+        branch:
+          - main