Added Installation section to README

README.md

@@ -10,6 +10,47 @@ on a server will be IP address of the client that made request to the server.
 
 Service is built with Python, FastAPI and is using Redis for data storage.
 
+## Installation
+
+### Requirements
+
+- Python 3.10+
+- Redis
+- Python development libraries (optional, only needed for `hiredis` module installation)
+
+### How to install
+
+#### TL/DR
+
+```
+$ git clone git@git.ivnglkv.ru:ivnglkv/rectes.git
+$ python3 -m venv venv
+$ . ./venv/bin/activate
+$ pip install ".[hiredis]"
+```
+
+---
+
+Steps to install Rectes:
+
+1. Clone repository
+2. (optional) Create virtual environment
+3. Install package
+
+#### Optional `hiredis` module
+
+Rectes server is using `aioredis` library for interaction with Redis. It's authors recommend using
+it with `hiredis` module for performance and stability reasons
+([source](https://github.com/aio-libs/aioredis-py#installation)).
+Rectes offers `hiredis` as optional but recommended dependency too. Thus, the recommended way to install
+Rectes will be with `[hiredis]` option. If you don't want to use `hiredis` for any reasons, install
+package without options:
+
+```
+$ pip install .
+```
+
+
 ## Contributing
 
 Codestyle is enforced with Black, and additional checks are done with the help of pre-commit-hooks,