Update README.md (#391)

* Update README.md

Fix numbering and typography

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README.md

@@ -56,29 +56,29 @@ The following example shows how you can run Grafana and the remote HTTP renderin
 
 1. Create a `docker-compose.yml` with the following content:
 
-```yaml
-version: '2'
-
-services:
-  grafana:
-    image: grafana/grafana:latest
-    ports:
-      - '3000:3000'
-    environment:
-      GF_RENDERING_SERVER_URL: http://renderer:8081/render
-      GF_RENDERING_CALLBACK_URL: http://grafana:3000/
-      GF_LOG_FILTERS: rendering:debug
-  renderer:
-    image: grafana/grafana-image-renderer:latest
-    ports:
-      - 8081
-```
+    ```yaml
+    version: '2'
+
+    services:
+      grafana:
+        image: grafana/grafana:latest
+        ports:
+          - '3000:3000'
+        environment:
+          GF_RENDERING_SERVER_URL: http://renderer:8081/render
+          GF_RENDERING_CALLBACK_URL: http://grafana:3000/
+          GF_LOG_FILTERS: rendering:debug
+      renderer:
+        image: grafana/grafana-image-renderer:latest
+        ports:
+          - 8081
+    ```
 
 1. Next, run docker compose.
 
-```bash
-docker-compose up
-```
+    ```bash
+    docker-compose up
+    ```
 
 ### Run as standalone Node.js application