replace tab with space for Caddyfile mods

mumble/README.md

@@ -51,6 +51,6 @@ networks:
 Remember to `docker exec -w /etc/caddy caddy caddy reload` after editing your Caddyfile.
 ```
 mumble.example.com {
-	reverse_proxy mumble-server:64738
+    reverse_proxy mumble-server:64738
 }
 ```

rocketchat/README.md

@@ -14,7 +14,7 @@
 Remember to `docker exec -w /etc/caddy caddy caddy reload` after editing your Caddyfile.
 ```
 subdomain.example.com {
-	reverse_proxy rocketchat:3000
+    reverse_proxy rocketchat:3000
 }
 ```
 

seafile/README.md

@@ -12,7 +12,7 @@
 Remember to `docker exec -w /etc/caddy caddy caddy reload` after editing your Caddyfile.
 ```
 subdomain.example.com {
-	reverse_proxy seafile:80
+    reverse_proxy seafile:80
 }
 ```
 

wordpress/README.md

@@ -13,11 +13,11 @@
 You may have done this already if you followed the [A-Z Guide](https://github.com/StarWhiz/docker_deployment_notes/tree/master/initial%20ubuntu%20setup#create-caddyfile) If not, do so and remember to `docker exec -w /etc/caddy caddy caddy reload` after editing your Caddyfile.
 ```
 example.com {
-	reverse_proxy wordpress:80
+    reverse_proxy wordpress:80
 }
 
 www.example.com {
-	reverse_proxy wordpress:80
+    reverse_proxy wordpress:80
 }
 ```