docs: added release apache apisix 2.7 English version blog (#397)

* docs: added release apache apisix 2.7 English version blog

* fix: md lint

* Update website/blog/2021-06-29-release-apache-apisix-2.7-en.md

Co-authored-by: 琚致远 <[email protected]>

* Update website/blog/2021-06-29-release-apache-apisix-2.7-en.md

Co-authored-by: 琚致远 <[email protected]>

* Update website/blog/2021-06-29-release-apache-apisix-2.7-en.md

Co-authored-by: 罗泽轩 <[email protected]>

* Update website/blog/2021-06-29-release-apache-apisix-2.7-en.md

Co-authored-by: Shuyang Wu <[email protected]>

* Update website/blog/2021-06-29-release-apache-apisix-2.7-en.md

Co-authored-by: Shuyang Wu <[email protected]>

* Update website/blog/2021-06-29-release-apache-apisix-2.7-en.md

Co-authored-by: Shuyang Wu <[email protected]>

* Update website/blog/2021-06-29-release-apache-apisix-2.7-en.md

Co-authored-by: Shuyang Wu <[email protected]>

* Update website/blog/2021-06-29-release-apache-apisix-2.7-en.md

Co-authored-by: Shuyang Wu <[email protected]>

* Update website/blog/2021-06-29-release-apache-apisix-2.7-en.md

Co-authored-by: Shuyang Wu <[email protected]>

* Update website/blog/2021-06-29-release-apache-apisix-2.7-en.md

Co-authored-by: Shuyang Wu <[email protected]>

* fix: md lint

fix: md lint

* Update website/blog/2021-06-29-release-apache-apisix-2.7-en.md

Co-authored-by: Shuyang Wu <[email protected]>

Co-authored-by: 琚致远 <[email protected]>
Co-authored-by: 罗泽轩 <[email protected]>
Co-authored-by: Shuyang Wu <[email protected]>

website/blog/2021-06-29-release-apache-apisix-2.7-en.md

@@ -0,0 +1,54 @@
+---
+title: "Release Apache APISIX 2.7.0"
+author: Serendipity96
+authorURL: "https://github.com/Serendipity96"
+authorImageURL: "https://avatars.githubusercontent.com/u/23514812?v=4"
+---
+> [@Serendipity96](https://github.com/Serendipity96), Apache APISIX contributor from [Shenzhen Zhiliu Technology Co.](https://www.apiseven.com/)
+>
+<!--truncate-->
+
+Apache APISIX 2.7.0 has been released! Welcome to download and use it.
+
+This version supports multi-language plugins, enhances the four-layer TCP proxy and Nginx configuration. More than 20 developers participated, and 70 plus pull requests have been submitted. The following is an introduction to the key features.
+
+## Release Notes
+
+### Multi-language plugin
+
+With the release of the first version of apisix-java-plugin-runner, and apisix-go-plugin-runner completes its main functions, the multi-language plugin of Apache APISIX supports the two most widely used back-end programming languages. If you are still worried that the development of Apache APISIX plugin will be limited to Lua ecosystem, please try our multi-language plugin runner to develop Java / Go plugins.
+
+### Enhanced four-layer TCP proxy
+
+In version 2.7, we have developed new features of TCP proxy, including:
+
+- Allow domain name configuration in upstream
+- Allow mqtt-proxy plugin to configure domain name
+- Support for receiving TLS over TCP connections, the certificate of which can be dynamically configured just like HTTPS certificate
+- SNI-based route rules
+- Dynamic verification of client certificates
+
+In future releases, we will continue to improve TCP proxy, so stay tuned!
+
+### Enhanced Nginx configuration
+
+We hope to dynamically set more and more Nginx configurations, so we add our own patches and Nginx C modules to enhance the native Nginx.
+
+The following new features are currently included:
+
+- Dynamically set mTLS
+- Dynamically set client_max_body_size
+
+In future releases, we will continue to allow the following Nginx configurations to be set dynamically:
+
+- upstream keepalive
+- gzip
+- real_ip
+- proxy_max_temp_file_size
+
+## Download
+
+Download Apache APISIX 2.7.0-Release
+
+- Source code: please visit [download page](https://apisix.apache.org/downloads/)
+- Binary installation package: please visit [Installation Guide](https://apisix.apache.org/zh/docs/apisix/how-to-build/)