Fix code

docs/index.md

@@ -21,17 +21,23 @@ Strawberry is built on top of Python’s
 
 Let’s create a new folder:
 
-    mkdir strawberry-demo
-    cd strawberry-demo
+```bash
+mkdir strawberry-demo
+cd strawberry-demo
+```
 
 After that we need a new virtualenv:
 
-    python -m venv virtualenv
+```bash
+python -m venv virtualenv
+```
 
 Activate the virtualenv and then install strawberry plus the debug server.
 
-    source virtualenv/bin/activate
-    pip install 'strawberry-graphql[debug-server]'
+```bash
+source virtualenv/bin/activate
+pip install 'strawberry-graphql[debug-server]'
+```
 
 ## Step 2: Define the schema
 
@@ -117,11 +123,15 @@ schema = strawberry.Schema(query=Query)
 
 Then run the following command
 
-    strawberry server schema
+```bash
+strawberry server schema
+```
 
 This will start a debug server, you should see the following output:
 
-    Running strawberry on http://0.0.0.0:8000/graphql 🍓
+```bash
+Running strawberry on http://0.0.0.0:8000/graphql 🍓
+```
 
 ## Step 6: execute your first query