Update nextcloud.json to upgrade nextcloud (#174)

* Update nextcloud.json

upgrade nextcloud from 15 to 18.0.4
from no config to fully configure to start

* take into account dev review comments

public/v2/apps/nextcloud.json

@@ -1,31 +1,85 @@
 {
     "captainVersion": "2",
     "documentation": "Taken from https://hub.docker.com/_/nextcloud",
-    "displayName": "",
+    "displayName": "nextcloud",
     "description": "Nextcloud is a suite of client-server software for creating and using file hosting services",
     "dockerCompose": {
         "version": "3.3",
         "services": {
+            "$$cap_appname-db": {
+                "documentation": "Taken from https://hub.docker.com/_/mariadb",
+                "image": "mariadb:$$cap_mariadb_version",
+                "notExposeAsWebApp": "true",
+                "volumes": [
+                    "$$cap_appname-db-data:/var/lib/mysql"
+                ],
+                "restart": "always",
+                "environment": {
+                    "MYSQL_ROOT_PASSWORD": "$$cap_db_pass",
+                    "MYSQL_DATABASE": "nextcloud",
+                    "MYSQL_USER": "$$cap_db_user",
+                    "MYSQL_PASSWORD": "$$cap_db_pass"
+                }
+            },
             "$$cap_appname": {
+                "depends_on": [
+                    "$$cap_appname-db"
+                ],
+                "documentation": "Taken from https://hub.docker.com/_/nextcloud",
                 "image": "nextcloud:$$cap_nextcloud_version",
                 "volumes": [
                     "$$cap_appname-data:/var/www/html"
                 ],
                 "restart": "always",
-                "environment": {}
+                "environment": {
+                    "MYSQL_DATABASE": "nextcloud",
+                    "MYSQL_USER": "$$cap_db_user",
+                    "MYSQL_PASSWORD": "$$cap_db_pass",
+                    "MYSQL_HOST": "srv-captain--$$cap_appname-db",
+                    "NEXTCLOUD_ADMIN_USER": "$$cap_admin_user",
+                    "NEXTCLOUD_ADMIN_PASSWORD": "$$cap_admin_pass",
+                    "NEXTCLOUD_TRUSTED_DOMAINS": "$$cap_appname.$$cap_root_domain"
+                }
             }
         }
     },
     "instructions": {
         "start": "A safe home for all your data. Access & share your files, calendars, contacts, mail & more from any device, on your terms. http://Nextcloud.com",
-        "end": "NextCloud is deployed and available as $$cap_appname"
+        "end": "NextCloud is deployed and will be available on few minutes as $$cap_appname"
     },
     "variables": [{
         "id": "$$cap_nextcloud_version",
         "label": "NextCloud Version",
-        "defaultValue": "15",
+        "defaultValue": "18.0.4",
-        "description": "Check out their Docker page for the valid tags https://hub.docker.com/r/library/nextcloud/tags/",
+        "description": "Check out their Docker page for the valid tags https://hub.docker.com/r/library/nextcloud/tags/\n\n do not use fpm versions.",
         "validRegex": "/^([^\\s^\\/])+$/"
+    },{
+        "id": "$$cap_mariadb_version",
+        "label": "MariaDB (database) version",
+        "defaultValue": "10.5.3",
+        "description": "Check out their Docker page for the valid tags https://hub.docker.com/_/mariadb?tab=tags",
+        "validRegex": "/^([^\\s^\\/])+$/"
+    },{
+        "id": "$$cap_db_pass",
+        "label": "database password",
+        "description": "Password for the database user and root using mysql.",
+        "validRegex": "/.{1,}/"
+    },{
+        "id": "$$cap_db_user",
+        "label": "database user",
+        "defaultValue": "nextcloud",
+        "description": "Username for the database using mysql.",
+        "validRegex": "/^([a-zA-Z0-9])+$/"
+    },{
+        "id": "$$cap_admin_user",
+        "label": "admin name",
+        "defaultValue": "admin",
+        "description": "Name of the Nextcloud admin user.",
+        "validRegex": "/^([a-zA-Z0-9\\@\\.])+$/"
+    },{
+        "id": "$$cap_admin_pass",
+        "label": "admin password",
+        "description": "Password for the Nextcloud admin user.",
+        "validRegex": "/.{1,}/"
     }]
-
+}
-}