[doc] Add a Chinese version documentation & Fix a bug while building website locally.

docs/config.toml

@@ -71,3 +71,14 @@ pygmentsUseClasses = true
 [markup]
 [markup.goldmark.renderer]
   unsafe = true
+
+[languages]
+[languages.en]
+  languageName = 'English'
+  contentDir = 'content'
+  weight = 1
+
+[languages.zh]
+  languageName = '中文版'
+  contentDir = 'content.zh'
+  weight = 2

docs/content.zh/_index.md

@@ -0,0 +1,51 @@
+---
+title: Apache Flink Machine Learning Library
+type: docs
+bookToc: false
+---
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+# Flink ML: Apache Flink Machine Learning Library
+
+Flink ML is a library which provides machine learning (ML) APIs and
+infrastructures that simplify the building of ML pipelines. Users can implement
+ML algorithms with the standard ML APIs and further use these infrastructures to
+build ML pipelines for both training and inference jobs.
+
+{{< columns >}}
+## Try Flink ML
+
+If you’re interested in playing around with Flink ML, check out our [quick
+start]({{< ref "docs/try-flink-ml/java/quick-start" >}}). It provides a simple
+example to submit and execute a Flink ML job on a Flink cluster.
+
+<--->
+
+## Get Help with Flink ML
+
+If you get stuck, check out our [community support
+resources](https://flink.apache.org/community.html). In particular, Apache
+Flink’s user mailing list is consistently ranked as one of the most active of
+any Apache project, and is a great way to get help quickly.
+
+{{< /columns >}}
+
+Flink ML is developed under the umbrella of [Apache
+Flink](https://flink.apache.org/).

docs/content.zh/docs/development/_index.md

@@ -0,0 +1,26 @@
+---
+title: Development
+icon: <i class="fa fa-code title maindish" aria-hidden="true"></i>
+bold: true
+sectionBreak: true
+bookCollapseSection: true
+weight: 2
+---
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->

docs/content.zh/docs/development/build-and-install.md

@@ -0,0 +1,111 @@
+---
+title: "Building And Installing Flink ML From Source"
+weight: 999
+type: docs
+aliases:
+- /development/build-and-install.html
+
+---
+
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+# Building And Installing Flink ML From Source
+
+This page covers how to build and install Flink ML from sources.
+
+## Build and Install Java SDK
+
+In order to build Flink ML you need the source code. Either [download the source
+of a release](https://flink.apache.org/downloads.html) or [clone the git
+repository](https://github.com/apache/flink-ml.git).
+
+In addition, you need **Maven 3** and a **JDK** (Java Development Kit). Flink ML
+requires **at least Java 8** to build.
+
+To clone from git, enter:
+
+```bash
+git clone https://github.com/apache/flink-ml.git
+```
+
+The simplest way of building Flink ML is by running:
+
+```bash
+mvn clean install -DskipTests
+```
+
+This instructs [Maven](http://maven.apache.org/) (`mvn`) to first remove all
+existing builds (`clean`) and then create a new Flink ML binary (`install`).
+
+Optionally, you can also specify the Flink version used by Flink ML with maven
+profile. Currently, Flink ML supports running on Flink 1.15, 1.16, and 1.17.
+For example, you can build Flink ML with Flink 1.16 by running:
+```bash
+mvn clean install -DskipTests -Pflink-1.16
+```
+
+After the build finishes, you can acquire the build result in the following path
+from the root directory of Flink ML:
+
+```
+./flink-ml-dist/target/flink-ml-*-bin/flink-ml*/
+```
+
+The `mvn clean install` command would have installed the binary into your local
+Maven repository so other projects can refer to it and grab it from the
+repository. There is no additional step required for installation.
+
+## Build and Install Python SDK
+
+### Prerequisites
+
+1. Building Flink ML Java SDK 
+
+   If you want to build Flink ML's Python SDK that can be used for pip
+   installation, you must first build the Java SDK, as described in the section
+   above.
+
+2. Python version(3.7, or 3.8) is required
+   ```shell
+   $ python --version
+   # the version printed here must be 3.7 or 3.8
+   ```
+
+3. Install the dependencies with the following command:
+   ```shell
+   $ python -m pip install -r flink-ml-python/dev/dev-requirements.txt
+   ```
+
+### Installation
+
+Then go to the root directory of Flink ML source code and run this command to
+build the sdist package of `apache-flink-ml`:
+
+```shell
+cd flink-ml-python; python setup.py sdist; cd ..;
+```
+
+The sdist package of `apache-flink-ml` will be found under
+`./flink-ml-python/dist/`. It could be installed as follows:
+
+```shell
+python -m pip install flink-ml-python/dist/*.tar.gz
+```
+