Typo (#16711)

In row 55 to 57 it is written following:
Within the `web` container, your connection string to `db` would look like
`postgres://db:5432`, and from the host machine, the connection string would
look like `postgres://{DOCKER_IP}:8001`.
As the container is running postgres on port 5432 the it should be `postgres://{DOCKER_IP}:5432` in the end of that sentence.

compose/networking.md

@@ -54,7 +54,7 @@ the service is accessible outside the swarm as well.
 
 Within the `web` container, your connection string to `db` would look like
 `postgres://db:5432`, and from the host machine, the connection string would
-look like `postgres://{DOCKER_IP}:8001`.
+look like `postgres://{DOCKER_IP}:5432`.
 
 ## Update containers on the network