Update postgres examples to be 18+ compatible

When starting the postgres examples, users are met with an error from the postgres container
stating that the volume should be changed.

See docker-library/postgres#1259 for details

Signed-off-by: Jonas Kalderstam <jonas@cowboyprogrammer.org>

Author: spacecowboy

examples/docker-compose-fpm-alpine.yaml

@@ -1,55 +1,56 @@
-version: '2'
+version: "2"
 
 services:
-  roundcubemail:
-    image: roundcube/roundcubemail:latest-fpm-alpine
-    container_name: roundcubemail
-    # restart: unless-stopped
-    depends_on:
-      - roundcubedb
-    links:
-      - roundcubedb
-    volumes:
-      - ./www:/var/www/html
-    environment:
-      - ROUNDCUBEMAIL_DB_TYPE=pgsql
-      - ROUNDCUBEMAIL_DB_HOST=roundcubedb # same as pgsql container name
-      - ROUNDCUBEMAIL_DB_NAME=roundcube # same as pgsql POSTGRES_DB env name
-      - ROUNDCUBEMAIL_DB_USER=roundcube # same as pgsql POSTGRES_USER env name
-      - ROUNDCUBEMAIL_DB_PASSWORD=roundcube # same as pgsql POSTGRES_PASSWORD env name
-      - ROUNDCUBEMAIL_SKIN=elastic
-      - ROUNDCUBEMAIL_DEFAULT_HOST=tls://mail.example.org
-      - ROUNDCUBEMAIL_SMTP_SERVER=tls://mail.example.org
+    roundcubemail:
+        image: roundcube/roundcubemail:latest-fpm-alpine
+        container_name: roundcubemail
+        # restart: unless-stopped
+        depends_on:
+            - roundcubedb
+        links:
+            - roundcubedb
+        volumes:
+            - ./www:/var/www/html
+        environment:
+            - ROUNDCUBEMAIL_DB_TYPE=pgsql
+            - ROUNDCUBEMAIL_DB_HOST=roundcubedb # same as pgsql container name
+            - ROUNDCUBEMAIL_DB_NAME=roundcube # same as pgsql POSTGRES_DB env name
+            - ROUNDCUBEMAIL_DB_USER=roundcube # same as pgsql POSTGRES_USER env name
+            - ROUNDCUBEMAIL_DB_PASSWORD=roundcube # same as pgsql POSTGRES_PASSWORD env name
+            - ROUNDCUBEMAIL_SKIN=elastic
+            - ROUNDCUBEMAIL_DEFAULT_HOST=tls://mail.example.org
+            - ROUNDCUBEMAIL_SMTP_SERVER=tls://mail.example.org
 
-  roundcubedb:
-    image: postgres:alpine
-    container_name: roundcubedb
-    # restart: unless-stopped
-    volumes:
-      - ./db/postgres:/var/lib/postgresql/data
-    environment:
-      - POSTGRES_DB=roundcube
-      - POSTGRES_USER=roundcube
-      - POSTGRES_PASSWORD=roundcube
+    roundcubedb:
+        image: postgres:alpine
+        container_name: roundcubedb
+        # restart: unless-stopped
+        volumes:
+            - ./db/postgres:/var/lib/postgresql
+        environment:
+            - POSTGRES_DB=roundcube
+            - POSTGRES_USER=roundcube
+            - POSTGRES_PASSWORD=roundcube
+
+    roundcubenginx:
+        image: nginx:alpine
+        container_name: roundcubenginx
+        # restart: unless-stopped
+        ports:
+            - 9008:80
+        depends_on:
+            - roundcubemail
+        links:
+            - roundcubemail
+        volumes:
+            - ./www:/var/www/html
+            - ./nginx/templates:/etc/nginx/templates
+            # Provide a custom nginx conf
+            # - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
+        environment:
+            - NGINX_HOST=localhost # set your local domain or your live domain
+            - NGINX_PHP_CGI=roundcubemail:9000 # same as roundcubemail container name
 
-  roundcubenginx:
-    image: nginx:alpine
-    container_name: roundcubenginx
-    # restart: unless-stopped
-    ports:
-      - 9008:80
-    depends_on:
-      - roundcubemail
-    links:
-      - roundcubemail
-    volumes:
-      - ./www:/var/www/html
-      - ./nginx/templates:/etc/nginx/templates
-      # Provide a custom nginx conf
-      # - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
-    environment:
-      - NGINX_HOST=localhost # set your local domain or your live domain
-      - NGINX_PHP_CGI=roundcubemail:9000 # same as roundcubemail container name
 
 ### Optional: add a full mail server stack to use with Roundcube like https://hub.docker.com/r/tvial/docker-mailserver
 #   mailserver:

examples/docker-compose-fpm.yaml

@@ -1,55 +1,56 @@
-version: '2'
+version: "2"
 
 services:
-  roundcubemail:
-    image: roundcube/roundcubemail:latest-fpm
-    container_name: roundcubemail
-    # restart: unless-stopped
-    depends_on:
-      - roundcubedb
-    links:
-      - roundcubedb
-    volumes:
-      - ./www:/var/www/html
-    environment:
-      - ROUNDCUBEMAIL_DB_TYPE=pgsql
-      - ROUNDCUBEMAIL_DB_HOST=roundcubedb # same as pgsql container name
-      - ROUNDCUBEMAIL_DB_NAME=roundcube # same as pgsql POSTGRES_DB env name
-      - ROUNDCUBEMAIL_DB_USER=roundcube # same as pgsql POSTGRES_USER env name
-      - ROUNDCUBEMAIL_DB_PASSWORD=roundcube # same as pgsql POSTGRES_PASSWORD env name
-      - ROUNDCUBEMAIL_SKIN=elastic
-      - ROUNDCUBEMAIL_DEFAULT_HOST=tls://mail.example.org
-      - ROUNDCUBEMAIL_SMTP_SERVER=tls://mail.example.org
+    roundcubemail:
+        image: roundcube/roundcubemail:latest-fpm
+        container_name: roundcubemail
+        # restart: unless-stopped
+        depends_on:
+            - roundcubedb
+        links:
+            - roundcubedb
+        volumes:
+            - ./www:/var/www/html
+        environment:
+            - ROUNDCUBEMAIL_DB_TYPE=pgsql
+            - ROUNDCUBEMAIL_DB_HOST=roundcubedb # same as pgsql container name
+            - ROUNDCUBEMAIL_DB_NAME=roundcube # same as pgsql POSTGRES_DB env name
+            - ROUNDCUBEMAIL_DB_USER=roundcube # same as pgsql POSTGRES_USER env name
+            - ROUNDCUBEMAIL_DB_PASSWORD=roundcube # same as pgsql POSTGRES_PASSWORD env name
+            - ROUNDCUBEMAIL_SKIN=elastic
+            - ROUNDCUBEMAIL_DEFAULT_HOST=tls://mail.example.org
+            - ROUNDCUBEMAIL_SMTP_SERVER=tls://mail.example.org
 
-  roundcubedb:
-    image: postgres:latest
-    container_name: roundcubedb
-    # restart: unless-stopped
-    volumes:
-      - ./db/postgres:/var/lib/postgresql/data
-    environment:
-      - POSTGRES_DB=roundcube
-      - POSTGRES_USER=roundcube
-      - POSTGRES_PASSWORD=roundcube
+    roundcubedb:
+        image: postgres:latest
+        container_name: roundcubedb
+        # restart: unless-stopped
+        volumes:
+            - ./db/postgres:/var/lib/postgresql
+        environment:
+            - POSTGRES_DB=roundcube
+            - POSTGRES_USER=roundcube
+            - POSTGRES_PASSWORD=roundcube
+
+    roundcubenginx:
+        image: nginx:latest
+        container_name: roundcubenginx
+        # restart: unless-stopped
+        ports:
+            - 9009:80
+        depends_on:
+            - roundcubemail
+        links:
+            - roundcubemail
+        volumes:
+            - ./www:/var/www/html
+            - ./nginx/templates:/etc/nginx/templates
+            # Provide a custom nginx conf
+            # - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
+        environment:
+            - NGINX_HOST=localhost # set your local domain or your live domain
+            - NGINX_PHP_CGI=roundcubemail:9000 # same as roundcubemail container name
 
-  roundcubenginx:
-    image: nginx:latest
-    container_name: roundcubenginx
-    # restart: unless-stopped
-    ports:
-      - 9009:80
-    depends_on:
-      - roundcubemail
-    links:
-      - roundcubemail
-    volumes:
-      - ./www:/var/www/html
-      - ./nginx/templates:/etc/nginx/templates
-      # Provide a custom nginx conf
-      # - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
-    environment:
-      - NGINX_HOST=localhost  # set your local domain or your live domain
-      - NGINX_PHP_CGI=roundcubemail:9000  # same as roundcubemail container name
 
 ### Optional: add a full mail server stack to use with Roundcube like https://hub.docker.com/r/tvial/docker-mailserver
 #   mailserver:

examples/kubernetes.yaml

@@ -114,7 +114,7 @@ spec:
         ports:
         - containerPort: 5432
         volumeMounts:
-        - mountPath: /var/lib/postgresql/data
+        - mountPath: /var/lib/postgresql
           name: roundcubedb-volume
       restartPolicy: Always
       serviceAccountName: ""