adding databag messenger service (#977)

* adding databag messenger service

* Update databag.yml with prettier style

* rerun prettier from within project

---------

Co-authored-by: balzack <roland.osborne@gmail.com>

public/v4/apps/databag.yml

@@ -0,0 +1,37 @@
+captainVersion: 4
+services:
+    '$$cap_appname':
+        image: balzack/databag:$$cap_version
+        environment:
+            TZ: '$$cap_tz'
+            PHP_TZ: '$$cap_tz'
+        volumes:
+            - '$$cap_appname-data:/var/lib/databag'
+        caproverExtra:
+            containerHttpPort: '7000'
+caproverOneClickApp:
+    variables:
+        - id: '$$cap_version'
+          label: Databag Version
+          defaultValue: '0.1.6'
+          description: Check out their Docker page for the valid tags https://hub.docker.com/r/balzack/databag/tags
+          validRegex: "/^([^\\s^\\/])+$/"
+        - id: '$$cap_tz'
+          label: Time Zone
+          defaultValue: America/Los_Angeles
+          description: Get yours from https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+          validRegex: '/.{1,}/'
+    instructions:
+        start: |-
+            Configure your instance and create accounts in the admin dashboard.
+            Login to your account and connect with others.
+            Start a conversation.
+
+            More details: https://github.com/balzack/databag
+        end: |-
+            Databag has been successfully deployed!
+            IMPORTANT!! You need to enable https and websocket support.
+    displayName: Databag
+    isOfficial: true
+    description: Databag is a federated chat app for selfhosting that focuses on privacy and security; the service includes clients for the browser as well as F-Droid, iOS and Android.
+    documentation: See https://github.com/balzack/databag