📝 docs: update ADR 0020 to reflect removal of certificate configuration step

adr/0020-docker-build-strategy.md

@@ -215,12 +215,14 @@ ENTRYPOINT ["/app/dance-lessons-coach"]
 jobs:
   build-cache:
     # Builds Docker cache image if needed
+    # Note: No certificate configuration needed with traditional docker
     
   ci-pipeline:
     needs: build-cache
     steps:
       - name: Set up build environment
         # Sets CACHE_IMAGE variable with proper tag
+        # No Buildx setup, no Go installation, no certificate configuration
         
       - name: Generate Swagger Docs using Docker cache
         # Uses: docker run ${{ env.CACHE_IMAGE }} sh -c "cd pkg/server && go generate"
@@ -233,6 +235,7 @@ jobs:
         
       - name: Build and push Docker image
         # Uses: docker build -t dance-lessons-coach -f Dockerfile.prod .
+        # No Buildx, no certificate issues
 ```
 
 ### Key Improvements
@@ -241,6 +244,8 @@ jobs:
 2. **Consistent Environment**: All builds use the same Docker cache image
 3. **Reduced Complexity**: Simpler workflow with fewer steps
 4. **Better Error Handling**: Docker cache handles dependency management
+5. **No Certificate Configuration**: Traditional docker works seamlessly with self-signed certificates
+6. **Improved Reliability**: Elimination of Buildx-related failures
 
 ## Future Considerations
 
@@ -317,6 +322,7 @@ This decision prioritizes CI/CD reliability and simplicity over advanced feature
 - [x] Keep `Dockerfile` for development use
 - [x] Remove Docker Buildx from CI/CD workflow
 - [x] Remove Go build steps from CI/CD workflow
+- [x] Remove certificate configuration step (no longer needed)
 - [x] Add Docker cache usage to all build steps
 - [x] Update production Docker build to use `Dockerfile.prod`
 - [x] Update ADR 0020 with comprehensive documentation