Merge pull request #5 from punktDe/debian-support

Edit README

README.md

@@ -4,38 +4,56 @@ A Docker role which can be used to deploy Docker containers as SystemD services.
 
 Installs the latest version of Docker from the official repos
 
-Compatible with Ubuntu 20.04 and 22.04
+Compatible with Ubuntu 20.04 & 22.04, as well as Debian 12.
 
 ### Usage
-Create a template in the role that manages your docker container with the following contents:
-```
-#jinja2: trim_blocks: False
+The following example describes setting up a Keycloak container.
+
+For a full example, please refer to our [ansible-keycloak](https://github.com/punktDe/ansible-keycloak) role
+
+* Create a template in the role that manages your docker container with the following contents:
+```jinja2
 {%- import (role_path + "/../docker/templates/systemd/container.service")|relpath(playbook_dir) as service with context -%}
-{{ service.All(example_container) }}
+{{ service.All(keycloak) }}
 ```
 
-Configure the container parameters using Ansible variables
-```
-example_container:
-    container_name: example
-    image: example:latest
-    container_stop_timeout: 55
-    volumes:
-        "/etc/config.cfg": { host_dir: "/var/example/config.cfg", relabel: unshared, read_only: yes }
-    ports:
-        8080: 80
-    environment:
-        KEY: "value"
-    entrypoint:
-        /etc/entrypoint
-    command:
-        echo "hello world"
+* Configure the container parameters using Ansible variables. You can add other arbitrary variables to the root of the `keycloak` dictionary (in this case, `domain` and `prefix`), and refer to them inside the same dictionary using the `vars.` prefix:
+```yaml
+keycloak:
+  domain: auth.example.com
+  prefix:
+    opt: /var/opt/keycloak
+  container_name: keycloak
+  image: quay.io/keycloak/keycloak:latest
+  container_stop_timeout: 55
+  depends_on:
+    - postgresql
+    - nginx
+  volumes:
+    "/opt/keycloak/conf":
+      host_dir: "{{ vars.keycloak.prefix.opt | quote }}/conf"
+      relabel: unshared
+      read_only: yes
+    "/opt/keycloak/themes":
+      host_dir: "{{ vars.keycloak.prefix.opt | quote }}/current/themes"
+    "/opt/keycloak/providers":
+      host_dir: "{{ vars.keycloak.prefix.opt | quote }}/current/providers"
+  ports:
+    127.0.0.1:8080: 8080
+  environment:
+    KEYCLOAK_FRONTEND_URL: "https://{{ vars.keycloak.domain }}/auth"
+    KC_PROXY: "edge"
+  entrypoint:
+    /bin/kc.sh start-dev
+  command:
+    echo "hello world"
 ```
 
-Finally, provision the service file:
-```
-- name: Install systemd service for example_container
+* Finally, provision the service file:
+```yaml
+- name: Install systemd service for Keycloak
   template:
-    src: example_container.service
-    dest: "/etc/systemd/system/example_container.service"
+    src: keycloak.service
+    dest: "/etc/systemd/system/keycloak.service"
+    trim_blocks: no
 ```