migrate to v4

public/v4/apps/radicale.yml

@@ -0,0 +1,23 @@
+captainVersion: 4
+services:
+  $$cap_appname:
+    image: tomsquest/docker-radicale:$$cap_image_tag
+    volumes:
+      - $$cap_appname-data:/data
+    restart: always
+    environment: {}
+    caproverExtra:
+      containerHttpPort: "5232"
+caproverOneClickApp:
+  variables:
+    - id: $$cap_image_tag
+      label: What version/tag do you want?
+      description: Go here to see all versions https://hub.docker.com/r/tomsquest/docker-radicale/tags
+      defaultValue: 2.1.12.1
+      validRegex: /^([^\s^\/])+$/
+  instructions:
+    start: Radicale is a small but powerful CalDAV (calendars, to-do lists) and CardDAV (contacts) server. It is strongly advised to secure your data with user passwords as stated here https://hub.docker.com/r/tomsquest/docker-radicale/
+    end: Radicale is deployed and available as $$cap_appname. To secure your user you can create a config like https://github.com/tomsquest/docker-radicale/blob/master/config and adapt it like stated here https://radicale.org/3.0.html#tutorials/basic-configuration. You need to create an volume pointing to the container path /etc/radicale/config to be picked up by the image.
+  displayName: Radicale
+  description: Radicale lightweight CalDAV and CardDAV Server
+  documentation: Taken from https://hub.docker.com/r/tomsquest/docker-radicale