Update README.md

README.md

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 # Parasitter
-Follow Twitter with privacy.
+> Twitter via RSS with privacy
+
+Rssitter allows you to follow your favourite twitters without Twitter even knowing it. Rssitter uses [Nitter's](nitter.net) rss feed in order to gather the latest tweets from your favourite accounts and builds a *twitter-like* feed so you can read them. We will never connect you to Twitter so your privacy is safe when using Parasitter.
+
+### Self hosting
+1. Install `python3`, `pip` and `virtualenv`.
+2. Prepare a virtual environment:
+    - `python3 -m venv venv`
+    - `source venv/bin/activate`
+  > Now you are inside of the virtual environment for python.
+3. [env] Update pip
+    - `pip install --upgrade pip`
+4. [env] Install the dependencies:
+    - `pip3 install flask flask-sqlalchemy flask-migrate python-dotenv flask-wtf flask-login email-validator feedparser`
+    > It may require you to use *sudo*
+5. [env] Initialize and prepare the database.
+    - `flask db init`
+    - `flask db migrate`
+    - `flask db upgrade`
+6. [env] Run the application.
+    - `flask run`
+7. Go to "http://localhost:5000/" and enjoy.