fix(api): fix incorrect docker build context (#37438)

Makefile

@@ -157,7 +157,7 @@ build-web:
 
 build-api:
 	@echo "Building API Docker image: $(API_IMAGE):$(VERSION)..."
-	docker build -t $(API_IMAGE):$(VERSION) ./api
+	docker build -t $(API_IMAGE):$(VERSION) -f api/Dockerfile .
 	@echo "API Docker image built successfully: $(API_IMAGE):$(VERSION)"
 
 # Push Docker images

api/Dockerfile.dockerignore

@@ -8,18 +8,30 @@
 !dify-agent/src/
 !dify-agent/src/**
 
-api/.venv
-api/.venv/**
-api/.env
-api/*.env.*
-api/.idea
-api/.mypy_cache
-api/.ruff_cache
-api/storage/generate_files/*
-api/storage/privkeys/*
-api/storage/tools/*
-api/storage/upload_files/*
-api/logs
-api/*.log*
+# Environment configuration and example
+.env
+*.env.*
+
+# Python related files
 **/__pycache__
 **/*.pyc
+**/.venv/
+**/.mypy_cache/
+**/.ruff_cache/
+**/.import_linter_cache/
+**/.pytest_cache/
+**/.hypothesis/
+
+
+# Upload files and logs
+api/storage/**
+api/logs/
+api/*.log*
+
+# Tests
+api/tests
+
+
+# Editor configuration
+**/.vscode/
+**/.idea/