[skip ci] Reorganize the structure

For more detailed introduction of Milvus and its architecture, see [Milvus overview](https://www.milvus.io/docs/en/aboutmilvus/overview/).

Milvus provides stable [Python](https://github.com/milvus-io/pymilvus), [Java](https://milvus-io.github.io/milvus-sdk-java/javadoc/io/milvus/client/package-summary.html) and C++ APIs. 

Milvus provides stable [Python](https://pypi.org/project/pymilvus/), [Java](https://milvus-io.github.io/milvus-sdk-java/javadoc/io/milvus/client/package-summary.html) and C++ APIs. 

Keep up-to-date with newest releases and latest updates by reading Milvus [release notes](https://www.milvus.io/docs/en/release/v0.5.0/).

## Get started

### Hardware requirements

See the [Milvus install guide](https://www.milvus.io/docs/en/userguide/install_milvus/) for using Docker containers. To install Milvus from source code, see [build from source](install.md).

| Component | Recommended configuration           |

| --------- | ----------------------------------- |

| CPU       | Intel CPU Haswell or higher         |

| GPU       | NVIDIA Pascal series or higher      |

| RAM       | 8 GB or more (depends on data size) |

| Hard drive| SATA 3.0 SSD or higher              |

### Install using docker

Using Docker to install Milvus is a breeze. See the [Milvus install guide](https://milvus.io/docs/en/userguide/install_milvus/) for details.

### Build from source

#### Software requirements

- Ubuntu 18.04 or higher

- CMake 3.14 or higher

- CUDA 10.0 or higher

- NVIDIA driver 418 or higher

#### Compilation

##### Step 1 Install dependencies

```shell

$ cd [Milvus sourcecode path]/core

$ ./ubuntu_build_deps.sh

```

##### Step 2 Build

```shell

$ cd [Milvus sourcecode path]/core

$ ./build.sh -t Debug

or 

$ ./build.sh -t Release

```

When the build is completed, all the stuff that you need in order to run Milvus will be installed under `[Milvus root path]/core/milvus`.

#### Launch Milvus server

```shell

$ cd [Milvus root path]/core/milvus

```

Add `lib/` directory to `LD_LIBRARY_PATH`

```

$ export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/milvus/lib

```

Then start Milvus server:

```

$ cd scripts

$ ./start_server.sh

```

To stop Milvus server, run:

```shell

$ ./stop_server.sh

```

To edit Milvus settings in `conf/server_config.yaml` and `conf/log_config.conf`, please read [Milvus Configuration](https://github.com/milvus-io/docs/blob/master/reference/milvus_config.md).

To edit Milvus settings, read [Milvus configuration](https://www.milvus.io/docs/en/reference/milvus_config/).

### Try your first Milvus program

#### Run Python example code

Please read [this page](https://www.milvus.io/docs/en/userguide/example_code/) for how to run an example program using Python SDK.

#### Run Java example code

Try running a program with Milvus using [Python](https://www.milvus.io/docs/en/userguide/example_code/) or [Java example code](https://github.com/milvus-io/milvus-sdk-java/tree/master/examples). 

Make sure Java 8 or higher is already installed.

Refer to [this link](https://github.com/milvus-io/milvus-sdk-java/tree/master/examples) for the example code.

#### Run C++ example code

To use C++ example code, use below command:

```shell

 # Run Milvus C++ example

## Roadmap

Please read our [roadmap](https://milvus.io/docs/en/roadmap/) to learn about upcoming features.

Please read our [roadmap](https://milvus.io/docs/en/roadmap/) for upcoming features.

## Contribution guidelines

[Milvus blog](https://www.milvus.io/blog/)

[Milvus CSDN](https://zilliz.blog.csdn.net/)

[Milvus Medium](https://medium.com/@milvusio)

[Milvus roadmap](https://milvus.io/docs/en/roadmap/)

[Milvus CSDN](https://zilliz.blog.csdn.net/)

## License