Fix SSD Docker installation (#5916)

* Fix SSD Docker installation

* Clarify endpoints and ports

docs/sources/installation/simple-scalable-docker.md

@@ -45,8 +45,12 @@ docker-compose up
 
 The running Docker containers use the directory's configuration files.
 
-Navigate to http://localhost:3100/ready to check for cluster readiness.
-Navigate to http://localhost:3100/metrics to view the cluster metrics.
+Navigate to http://localhost:3101/ready to check for read container readiness.
+Navigate to http://localhost:3101/metrics to view read container metrics.
+
+Navigate to http://localhost:3102/ready to check for write container readiness.
+Navigate to http://localhost:3102/metrics to view write container metrics.
+
 Navigate to http://localhost:3000 for the Grafana instance that has Loki configured as a datasource.
 
 By default, the image runs processes as user loki with  UID `10001` and GID `10001`.

production/simple-scalable/docker-compose.yaml

@@ -9,7 +9,7 @@ services:
     image: grafana/loki:2.5.0
     command: "-config.file=/etc/loki/config.yaml -target=read"
     ports:
-      - 3100
+      - 3101:3100
       - 7946
       - 9095
     volumes:
@@ -25,7 +25,7 @@ services:
     image: grafana/loki:2.5.0
     command: "-config.file=/etc/loki/config.yaml -target=write"
     ports:
-      - 3100
+      - 3102:3100
       - 7946
       - 9095
     volumes: