Update nextcloud configuration files for consistency and clarity

nextcloud/nextcloud-secret.json

@@ -1,9 +1,9 @@
 {
     "nextcloudmysql": {
-		"MARIADB_DATABASE": "#MARIADB_DATABASE",
-		"MARIADB_USER": "#MARIADB_USER",
-		"MARIADB_PASSWORD": "#MARIADB_PASSWORD",
-		"MARIADB_ROOT_PASSWORD": "#MARIADB_ROOT_PASSWORD"
+        "MYSQL_DATABASE": "#MARIADB_DATABASE",
+        "MMYSQL_USER": "#MARIADB_USER",
+        "MYSQL_PASSWORD": "#MARIADB_PASSWORD",
+        "MYSQL_ROOT_PASSWORD": "#MARIADB_ROOT_PASSWORD"
     },
     "nextcloudphp": {
         "NEXTCLOUD_ADMIN_USER": "#NEXTCLOUD_ADMIN_USER",

nextcloud/service-nextcloud.json

@@ -1,7 +1,7 @@
 {
     "main": {
         "SERVICE_NAME": "nextcloud",
-        "DOMAIN": "DOMAIN"
+        "DOMAIN": "#DOMAIN"
     },
     "containers": [
         {
@@ -118,7 +118,7 @@
             "POST_START": "null"
         },
         {
-            "IMAGE": "nextcloud:VERSION",
+            "IMAGE": "nextcloud:#VERSION",
             "UPDATE": "true",
             "NAME": "nextcloudphp-fpm",
             "MEMORY": "1024M",