feat: enhance Docker build process and deployment options

- Add multi-platform Docker build support with docker-bake.hcl
- Update Dockerfile with improved production build configurations
- Enhance Makefile with streamlined deployment targets for local, dev, and prod
- Improve buildx-helper.sh script for better cross-platform builds
- Fix production build security validations for JWT_SECRET and SESSION_SECRET
- Add comprehensive deployment documentation and environment setup guides

These changes enable efficient multi-platform image creation and provide
clear deployment workflows for different environments.

Makefile

@@ -110,6 +110,42 @@ docker-build: ## Build Docker images (local and multi-platform)
 	@bun run docker:build-local
 	@bun run docker:build 2>/dev/null || true
 
+docker-build-local: ## Build Docker image for local platform only
+	@printf "$(BLUE)Building local Docker image...$(RESET)\n"
+	@./scripts/buildx-helper.sh build-local
+
+docker-build-multi: ## Build multi-platform Docker images
+	@printf "$(BLUE)Building multi-platform Docker images...$(RESET)\n"
+	@./scripts/buildx-helper.sh build-multi
+
+docker-build-multi-dev: ## Build multi-platform Docker images for development
+	@printf "$(BLUE)Building multi-platform Docker images for development...$(RESET)\n"
+	@./scripts/buildx-helper.sh build-multi-dev
+
+docker-build-push: ## Build and push multi-platform Docker images
+	@printf "$(BLUE)Building and pushing multi-platform Docker images...$(RESET)\n"
+	@./scripts/buildx-helper.sh build-push
+
+docker-push: ## Push existing Docker images to registry
+	@printf "$(BLUE)Pushing Docker images to registry...$(RESET)\n"
+	@./scripts/buildx-helper.sh push
+
+docker-setup: ## Setup Docker buildx builder instance
+	@printf "$(BLUE)Setting up Docker buildx builder...$(RESET)\n"
+	@./scripts/buildx-helper.sh setup
+
+docker-inspect: ## Inspect Docker buildx builder
+	@printf "$(BLUE)Inspecting Docker buildx builder...$(RESET)\n"
+	@./scripts/buildx-helper.sh inspect
+
+docker-bake: ## Build using docker-bake.hcl
+	@printf "$(BLUE)Building using docker-bake.hcl...$(RESET)\n"
+	@./scripts/buildx-helper.sh bake
+
+docker-list: ## List available Docker buildx builders
+	@printf "$(BLUE)Listing Docker buildx builders...$(RESET)\n"
+	@./scripts/buildx-helper.sh list
+
 docker-down: ## Stop and remove Docker containers
 	@printf "$(BLUE)Stopping Docker containers...$(RESET)\n"
 	@if docker-compose -f docker/docker-compose.yaml ps --services 2>/dev/null | grep -q .; then \
@@ -125,6 +161,10 @@ docker-clean: docker-down ## Stop containers and clean up volumes/images
 	@docker image prune -f --filter "until=24h" 2>/dev/null || true
 	@docker volume prune -f 2>/dev/null || true
 
+docker-cleanup: ## Remove buildx builder and cleanup
+	@printf "$(BLUE)Cleaning up Docker buildx resources...$(RESET)\n"
+	@./scripts/buildx-helper.sh cleanup
+
 ##@ Kubernetes Deployment
 
 deploy-dev: ## Deploy to development environment