docs: add better env variable instructions (#863)

docs/getting-started/docker.mdx

@@ -37,8 +37,11 @@ docker run -d \
   --restart unless-stopped \
   fallenbagel/jellyseerr
 ```
-:::info
+:::tip
 If you are using emby, make sure to set the `JELLYFIN_TYPE` environment variable to `emby`.
+```bash
+-e JELLYFIN_TYPE=emby
+```
 :::
 
 To run the container as a specific user/group, you may optionally add `--user=[ user | user:group | uid | uid:gid | user:gid | uid:group ]` to the above command.
@@ -86,8 +89,12 @@ services:
       - /path/to/appdata/config:/app/config
     restart: unless-stopped
 ```
-:::info
+:::tip
 If you are using emby, make sure to set the `JELLYFIN_TYPE` environment variable to `emby`.
+```yaml
+    environment:
+      - JELLYFIN_TYPE=emby
+```
 :::
 
 Then, start all services defined in the Compose file: