update readme with extra docs

README.md

@@ -6,16 +6,29 @@ Start an order and let people add items with a simple mouse-click!
 No more calculating prices and making lists!
 Be lazier today!
 
-Local hosting steps
-===================
-0. This is a Python 3 project so make sure to use python 3 and pip3 everywhere
-1. Run `pip install -r requirements.txt`
-2. `cd app`
-3. Copy `config.example.py` to `config.py`
-4. Copy the python files from `database/` to `app/` (yes, it's sad, I know)
-5. Run `python create_database.py` in `app/` (if you want to fill the DB with sample data be sure to answer `Y` to `Do you still want to add something?`)
-6. Run `rm -f add_* create_database.py*` in `app/`
-7. Run `python haldis.py runserver`
+## Local setup
 
----
-Or run `./first-setup.sh` in the root of the git folder (in linux)
+There is a special script to get started with the project. Just run it in the root of the project.
+
+    first-setup.sh
+    
+This will create a virtual environment, install the necessary dependencies and will give you the option to seed the database.
+
+If you are using a database other then sqlite you will first need to configure the correct uri to the database in the generated 'config.py' file.
+Afterwards upgrade the database to the latest version using 
+
+    python haldis.py db upgrade
+    
+You can now still seed the database by running
+
+    ./populate-db.sh
+    
+in the root folder of the project.
+    
+## Development
+
+### Changing the database
+
+1. Update models located in 'app/models.py'
+2. Run `python haldis.py db migrate` to create a new migration.
+3. Apply the changes to the database using `python haldis.py db upgrade`