Fix workflow to only rebuild on actual image changes

- Remove docker-compose.yml from build triggers (doesn't affect image)
- Remove config/** from triggers (mounted at runtime, not in image)
- Remove requirements.txt (not used in current Dockerfile)

This prevents unnecessary rebuilds when only documentation or
runtime configuration changes.

Author: cabinlab

.github/workflows/build-and-publish.yml

@@ -6,25 +6,19 @@ on:
     tags: [ 'v*' ]
     paths:
       - 'Dockerfile'
-      - 'docker-compose.yml'
       - 'providers/**'
-      - 'config/**'
       - 'scripts/**'
       - 'startup.py'
       - 'custom_handler.py'
-      - 'requirements.txt'
       - '.github/workflows/build-and-publish.yml'
   pull_request:
     branches: [ main ]
     paths:
       - 'Dockerfile'
-      - 'docker-compose.yml'
       - 'providers/**'
-      - 'config/**'
       - 'scripts/**'
       - 'startup.py'
       - 'custom_handler.py'
-      - 'requirements.txt'
       - '.github/workflows/build-and-publish.yml'
   workflow_dispatch: