added notes about tests

Author: yvess

README.md

@@ -66,6 +66,17 @@ Database files and static generated files are stored in `var` folder.
 make up
 ```
 
+### tests
+
+```bash
+make tests
+```
+
+This command runs first the backend tests and afterwards the frontend test.
+
+For the backend tests a new test database is generated and the fixtures are loaded.
+
+
 ### editor
 
 The project is setup to work with visual studio code as editor. Any other editor is also fine.
@@ -101,4 +112,4 @@ Type `make deploy_prod` in the project root. The file `env.hosts.prod` needs to
 - [django](/docs/django.md)
 - [links](/docs/links.md)
 - [grahpql](/docs/graphql.md)
-- [troubleshooting](/docs/troubleshooting.md)
+- [troubleshooting](/docs/troubleshooting.md)