Create README file and add installation instructions

README.md

@@ -0,0 +1,23 @@
+# this OR that
+
+Telegram mini-app where you have to choose one of two things.
+
+## Installation
+
+1. Installing the repository:
+```bash
+git install https://github.com/IgorVolochay/thisORthat
+```
+
+2. The project is written in Python3.9. Make sure you have it on your system. Go to the project folder, create a virtual environment and download pip requirements.
+```bash
+cd ./thisORthat
+python3.9 -m venv venv
+source ./venv/bin/activate
+pip3 install -r requirements.txt
+```
+
+3. Installing MongoDB database. You can use the [official manual](https://www.mongodb.com/docs/manual/installation/) to install MongoDB manually, or use a [Docker image](https://hub.docker.com/r/mongodb/mongodb-community-server) to run the container:
+```bash
+docker run --name mongodb -d -p 27017:27017 mongodb/mongodb-community-server
+```