Correcting landing page indent

Original indent was one space, should have been 2 spaces, otherwise
you get parse errors.

bbmri/docker-compose.yml

@@ -39,18 +39,18 @@ services:
     volumes:
       - /etc/bridgehead/trusted-ca-certs:/docker/custom-certs/:ro
 
- landing:
-   container_name: bridgehead-landingpage
-   image: samply/bridgehead-landingpage:master
-   labels:
-     - "traefik.enable=true"
-     - "traefik.http.routers.landing.rule=PathPrefix(`/`)"
-     - "traefik.http.services.landing.loadbalancer.server.port=80"
-     - "traefik.http.routers.landing.tls=true"
-   environment:
-     HOST: ${HOST}
-     PROJECT: ${PROJECT}
-     SITE_NAME: ${SITE_NAME}
+  landing:
+    container_name: bridgehead-landingpage
+    image: samply/bridgehead-landingpage:master
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.landing.rule=PathPrefix(`/`)"
+      - "traefik.http.services.landing.loadbalancer.server.port=80"
+      - "traefik.http.routers.landing.tls=true"
+    environment:
+      HOST: ${HOST}
+      PROJECT: ${PROJECT}
+      SITE_NAME: ${SITE_NAME}
 
   blaze:
     image: "samply/blaze:0.18"