Docker: Improve docker-compose.yml example documentation

docker/examples/arm64/docker-compose.yml

@@ -41,7 +41,7 @@ version: '3.5'
 # docker-compose exec photoprism photoprism faces index
 #
 # All commands may have to be prefixed with "sudo" when not running as root.
-# This will point the home directory placeholder ~ to /root in volume mounts.
+# This will point the home directory shortcut ~ to /root in volume mounts.
 
 services:
   ## App Server (required)

docker/examples/armv7/docker-compose.yml

@@ -37,7 +37,7 @@ version: '3.5'
 # docker-compose exec photoprism photoprism faces index
 #
 # All commands may have to be prefixed with "sudo" when not running as root.
-# This will point the home directory placeholder ~ to /root in volume mounts.
+# This will point the home directory shortcut ~ to /root in volume mounts.
 
 services:
   ## App Server (required)

docker/examples/docker-compose.yml

@@ -34,7 +34,7 @@ version: '3.5'
 # docker-compose exec photoprism photoprism faces index
 #
 # All commands may have to be prefixed with "sudo" when not running as root.
-# This will point the home directory placeholder ~ to /root in volume mounts.
+# This will point the home directory shortcut ~ to /root in volume mounts.
 
 services:
   ## App Server (required)

docker/examples/scheduler/docker-compose.yml

@@ -35,7 +35,7 @@ version: '3.5'
 # docker-compose exec photoprism photoprism faces index
 #
 # All commands may have to be prefixed with "sudo" when not running as root.
-# This will point the home directory placeholder ~ to /root in volume mounts.
+# This will point the home directory shortcut ~ to /root in volume mounts.
 
 services:
   ## App Server (required)

docker/examples/sqlite/docker-compose.yml

@@ -36,7 +36,7 @@ version: '3.5'
 # docker-compose exec photoprism photoprism faces index
 #
 # All commands may have to be prefixed with "sudo" when not running as root.
-# This will point the home directory placeholder ~ to /root in volume mounts.
+# This will point the home directory shortcut ~ to /root in volume mounts.
 
 services:
   ## App Server (required)