fix readme format

readme.md

@@ -8,26 +8,30 @@ I'm using this at a raspberry pi gaming station to enforce usage limits.
 
 ## Config
 
-  # how often should the script check for apps runtime?
-  check-interval: 1
-  # timers: list of apps that will be watched
-  timers:
-    # the app name (list key)
-    gaming:
-      # list of the app executables
-      apps:
-        - retroarch
-        - minecraft
-      # how many minutes of usage
-      time-limit: 60
-      # within how many hours of interval
-      limit-interval: 12
+```yaml
+# how often should the script check for apps runtime?
+check-interval: 1
+# timers: list of apps that will be watched
+timers:
+  # the app name (list key)
+  gaming:
+    # list of the app executables
+    apps:
+      - retroarch
+      - minecraft
+    # how many minutes of usage
+    time-limit: 60
+    # within how many hours of interval
+    limit-interval: 12
+```
 
 ## Installation
 
 There's a systemd service file ready for use.
 
+```bash
   cp ./timer.service /etc/systemd/system/app-timer.service
   systemctl enable app-timer
+```
 
 Update this file to point `ExecStart` into your setup folder.