docs: revise readme.md and introduce contributing.md

CONTRIBUTING.md

+## Contributing to Picodata
+This document describes contributing to Picodata
+
+### Building Picodata from source
+#### Required build tools
+- Rust and Cargo 1.59 or newer
+- Cmake 3.16 or newer
+- gcc, g++
+- libstc++-static
+
+#### Prerequisites for CentOS 8
+Use the following commands to install the required build prerequisites. Note that you'll need recent Rust and Cargo versions installed using the recommended way from [rustup.rs](rustup.rs):
+```
+sudo dnf config-manager --set-enabled powertools
+sudo dnf in -y gcc gcc-c++ make cmake git patch libstdc++-static
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+source "$HOME/.cargo/env"
+```
+#### Prerequisites for Ubuntu 22.04
+Use the following command to install the required build prerequisites. Note that Ubuntu 22.04 provides recent Rust and Cargo versions, so it's preferable to install it via `apt-get`:
+```
+sudo apt-get install build-essential cargo git cmake -y
+```
+
+#### Prerequisites for Alt Workstation p10
+Use the following commands to install the required build prerequisites. Note that you'll need recent Rust and Cargo versions installed using the recommended way from [rustup.rs](rustup.rs):
+```
+su -
+apt-get install gcc gcc-c++ cmake git patch libstdc++10-devel-static libgomp10-devel-static -y && exit
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+source "$HOME/.cargo/env"
+```
+
+#### Getting and building the source code
+```
+git clone https://git.picodata.io/picodata/picodata/picodata.git
+cd picodata
+git submodule update --init
+```
+Compile the project:
+```
+cargo build
+```
+
+This will build the debug version. If you want the release version, try this instead:
+
+```
+cargo build --release
+```
+The resulting binaries should appear under the  `target` subdirectory.
+
+### Integration testing with pytest
+The following refers to Ubuntu 20.04 LTS. The mileage with other distributions may vary.
+
+#### Installation
+
+1. Install Python 3.10
+
+     ```
+   sudo add-apt-repository ppa:deadsnakes/ppa
+   sudo apt install python3.10 python3.10-distutils
+   curl -sSL https://bootstrap.pypa.io/get-pip.py -o get-pip.py
+   python3.10 get-pip.py
+   ```
+
+3. Install pipenv:
+
+    ```
+    python3.10 -m pip install pipenv==2022.4.8
+    ```
+
+4. Install dependencies
+
+    ```
+    python3.10 -m pipenv install --deploy
+    ```
+
+#### Adding dependencies
+
+```bash
+python3.10 -m pipenv install <dependency-package-name>
+```
+
+#### Running
+
+```bash
+python3.10 -m pipenv run pytest
+python3.10 -m pipenv run lint
+```
+
+or
+
+```bash
+python3.10 -m pipenv shell
+# A new shell will be opened inside the pipenv environment
+pytest
+pipenv run lint
+```
+
+#### Running tests in parallel with pytest-xdist
+
+```bash
+python3.10 -m pipenv run pytest -n 20
+```

README.md

-## Integration testing with pytest
+## Picodata – Professional Data Management System for High Loads
+This repository contains the source code of Picodata, an in-memory distributed application server with a built-in database.
 
-### Installation
+### What is Picodata
+Picodata is a software for building professional data management systems. It provides a data storage system together with a development platform and a runtime for persistent applications written in Rust. Learn more about our software at the [picodata.io](picodata.io) web site.
 
-1. Install Python 3.10
+### Getting Picodata
+We provide pre-built Picodata packages for select Linux distributions including CentOS and Ubuntu. Head over to our [downloads page](https://picodata.io/download/) to find out installation details. 
 
-   **Ubuntu:**
-
-   ```
-   sudo add-apt-repository ppa:deadsnakes/ppa
-   sudo apt install python3.10 python3.10-distutils
-   curl -sSL https://bootstrap.pypa.io/get-pip.py -o get-pip.py
-   python3.10 get-pip.py
-   ```
-
-3. Install pipenv:
-
-    ```
-    python3.10 -m pip install pipenv==2022.4.8
-    ```
-
-4. Install dependencies
-
-    ```
-    python3.10 -m pipenv install --deploy
-    ```
-
-### Adding dependencies
+### Running Picodata
+Running a Picodata instance only takes one simple command: `picodata run`. Getting a basic distributed cluster made of two instances running on different hosts involves two commands, like this:
 
 ```bash
-python3.10 -m pipenv install <dependency-package-name>
+picodata run --listen 192.168.0.1:3301
+picodata run --listen 192.168.0.2:3301 --peer 192.168.0.1:3301 
 ```
+You can find out more about getting started procedures and first steps by heading to our [documentation site](https://docs.picodata.io/picodata/install/#_2).
 
-### Running
-
-```bash
-python3.10 -m pipenv run pytest
-python3.10 -m pipenv run lint
-```
-
-or
-
-```bash
-python3.10 -m pipenv shell
-# A new shell will be opened inside the pipenv environment
-pytest
-pipenv run lint
-```
-
-#### Running tests in parallel with pytest-xdist
-
-```bash
-python3.10 -m pipenv run pytest -n 20
-```
+### Building Picodata from source
+Our pre-built packages provide a statically linked `picodata` binary that have no extra dependencies other than a recent `glibc` library version. However, you may want or need to compile the software from the source. Please refer to the [CONTRIBUTING.md](CONTRIBUTING.md) document for compilation instructions and running integration tests.