Allow nextcloud to create the postgres db (#784)

Signed-off-by: Tilo Spannagel <development@tilosp.de>

.examples/docker-compose/insecure/postgres/apache/db.env

 POSTGRES_PASSWORD=
-POSTGRES_DB=nextcloud
-POSTGRES_USER=nextcloud
+POSTGRES_USER=postgres

.examples/docker-compose/insecure/postgres/apache/docker-compose.yml

@@ -18,6 +18,7 @@ services:
       - nextcloud:/var/www/html
     environment:
       - POSTGRES_HOST=db
+      - POSTGRES_DB=nextcloud
     env_file:
       - db.env
     depends_on:

.examples/docker-compose/insecure/postgres/fpm/db.env

 POSTGRES_PASSWORD=
-POSTGRES_DB=nextcloud
-POSTGRES_USER=nextcloud
+POSTGRES_USER=postgres

.examples/docker-compose/insecure/postgres/fpm/docker-compose.yml

@@ -16,6 +16,7 @@ services:
       - nextcloud:/var/www/html
     environment:
       - POSTGRES_HOST=db
+      - POSTGRES_DB=nextcloud
     env_file:
       - db.env
     depends_on:

.examples/docker-compose/with-nginx-proxy/postgres/apache/db.env

 POSTGRES_PASSWORD=
-POSTGRES_DB=nextcloud
-POSTGRES_USER=nextcloud
+POSTGRES_USER=postgres

.examples/docker-compose/with-nginx-proxy/postgres/apache/docker-compose.yml

@@ -19,6 +19,7 @@ services:
       - LETSENCRYPT_HOST=
       - LETSENCRYPT_EMAIL=
       - POSTGRES_HOST=db
+      - POSTGRES_DB=nextcloud
     env_file:
       - db.env
     depends_on:

.examples/docker-compose/with-nginx-proxy/postgres/fpm/db.env

 POSTGRES_PASSWORD=
-POSTGRES_DB=nextcloud
-POSTGRES_USER=nextcloud
+POSTGRES_USER=postgres

.examples/docker-compose/with-nginx-proxy/postgres/fpm/docker-compose.yml

@@ -16,6 +16,7 @@ services:
       - nextcloud:/var/www/html
     environment:
       - POSTGRES_HOST=db
+      - POSTGRES_DB=nextcloud
     env_file:
       - db.env
     depends_on: