Docker: Improve example docker-compose.yml files

Signed-off-by: Michael Mayer <michael@liquidbytes.net>

docker/photoprism/arm64/docker-compose.yml

@@ -57,3 +57,25 @@ services:
       - /photoprism/storage                          # Keep cache and settings when upgrading or restarting
       - "~/Pictures/Originals:/photoprism/originals" # [local path]:[container path]
       - "~/Pictures/Import:/photoprism/import"       # [local path]:[container path] (optional)
+
+# Uncomment the following lines to use MariaDB instead of SQLite for improved performance & scalability:
+#
+#  photoprism-db:
+#    image: mariadb:10.5 # Alternatively mysql:8.0
+#    restart: unless-stopped
+#    command: mysqld --transaction-isolation=READ-COMMITTED --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci --max-connections=1024 --innodb-rollback-on-timeout=OFF --innodb-lock-wait-timeout=50
+#    volumes:
+#      - /var/lib/mysql
+#    environment:
+#      MYSQL_ROOT_PASSWORD: photoprism
+#      MYSQL_USER: user
+#      MYSQL_PASSWORD: passwd
+#      MYSQL_DATABASE: photoprism
+
+# Uncomment the following lines to upgrade automatically whenever there are new container images available:
+#
+#  watchtower:
+#    restart: unless-stopped
+#    image: containrrr/watchtower
+#    volumes:
+#      - /var/run/docker.sock:/var/run/docker.sock

docker/photoprism/docker-compose.yml

@@ -56,7 +56,7 @@ services:
       - "~/Pictures/Originals:/photoprism/originals" # [local path]:[container path]
       - "~/Pictures/Import:/photoprism/import"       # [local path]:[container path] (optional)
 
-# Uncomment the following lines to use MariaDB instead of SQLite for improved performance & scalability
+# Uncomment the following lines to use MariaDB instead of SQLite for improved performance & scalability:
 #
 #  photoprism-db:
 #    image: mariadb:10.5 # Alternatively mysql:8.0
@@ -69,3 +69,11 @@ services:
 #      MYSQL_USER: user
 #      MYSQL_PASSWORD: passwd
 #      MYSQL_DATABASE: photoprism
+
+# Uncomment the following lines to upgrade automatically whenever there are new container images available:
+#
+#  watchtower:
+#    restart: unless-stopped
+#    image: containrrr/watchtower
+#    volumes:
+#      - /var/run/docker.sock:/var/run/docker.sock