Improve Trendz Settings docs + minor fixes

_includes/templates/trendz/install/docker-compose.md

@@ -3,7 +3,7 @@ services:
   trendz:
     profiles: ['trendz']
     restart: always
-    image: "thingsboard/trendz:1.14.0"
+    image: "thingsboard/trendz:{{ site.release.trendz_ver }}"
     ports:
       - "8888:8888"
     environment:
@@ -20,7 +20,7 @@ services:
   trendz-python-executor:
     profiles: ['trendz']
     restart: always
-    image: "thingsboard/trendz-python-executor:1.14.0"
+    image: "thingsboard/trendz-python-executor:{{ site.release.trendz_ver }}"
     ports:
       - "8181:8181"
     environment:

docs/pe/user-guide/ui/trendz-settings.md

@@ -3,6 +3,11 @@ layout: docwithnav-pe
 title: Trendz settings
 description: ThingsBoard IoT platform Trendz settings
 
+trendz-settings:
+  0:
+    image: /images/user-guide/ui/trendz/trendz-settings.png
+    title: 'Trendz settings page.'
+
 trendz-settings-sync-status:
   0:
     image: /images/user-guide/ui/trendz/trendz-settings-sync-status-1.png
@@ -13,17 +18,53 @@ trendz-settings-sync-status:
 
 ---
 
+* TOC
+{:toc}
+
 On the **Trendz Settings** page, you can configure the connection to the [Trendz Analytics add-on](/docs/trendz/what-is-trendz).
 
-Log in to ThingsBoard as a System Administrator.
+## Prerequisites
+
+* Trendz addon should be activated for ThingsBoard instance on which you want to use Trendz. You can find out how to activate it [here](/docs/trendz/activation/self-managed).
+* Trendz should be installed and accessible from ThingsBoard. You can find out how to install Trendz [here](/docs/trendz/install/installation-options).
 
-![image](/images/user-guide/ui/trendz/trendz-settings.png)
+## How to Access
+
+* Log in to ThingsBoard as a System Administrator.
+* Click **Trendz settings** tab in the left menu.
+
+{% include images-gallery.html imageCollection="trendz-settings" %}
+
+## Trendz Configuration
 
 Here you can set up **Trendz Configuration**:
 * **Trendz Internal URL** - URL used by ThingsBoard to communicate with Trendz.
 * **ThingsBoard Internal URL** - URL used by Trendz to communicate with ThingsBoard.
 
+### Examples
+
+Url examples for different installation types:
+
+* **Ubuntu / Windows / CentOS / RHEL (Trendz and ThingsBoard installed on the same machine)**:
+  - Trendz Internal URL - `http://localhost:8888` 
+  - ThingsBoard Internal URL - `http://localhost:8080`
+
+* **Docker (Trendz and ThingsBoard are in the same docker compose files)**:
+  - Trendz Internal URL - `http://trendz:8888`
+  - ThingsBoard Internal URL - `http://thingsboard-pe:8080`
+
+* **Kubernetes (ThingsBoard and Trendz are in the same cluster)**:
+  - Trendz Internal URL - `http://trendz-app:8888`
+  - ThingsBoard Internal URL - `http://tb-node:8080`
+
+If Trendz and ThingsBoard are unreachable for each other in the private network, you can use your public URLs. For example, if ThingsBoard and Trendz under the same domain **mydomain**:
+  - Trendz Internal URL - `https://mydomain`
+  - ThingsBoard Internal URL - `https://mydomain`
+
+## Actions
+
 You can do the next **Actions** on this page:
+
 * **Save Configuration** - Saves the URLs entered in the text boxes for Trendz and ThingsBoard.
 * **Retry Discovery** - Initiates synchronization with Trendz using the **saved configuration**.
 * **Retry Healthcheck** - (Visible only if Trendz is synced with ThingsBoard) Checks if the Trendz sync contains any errors at the current moment.

docs/trendz/install/trndz-upgrade-instructions-kubernetes.md

@@ -43,15 +43,15 @@ kubectl scale deployment trendz-app-deployment --replicas=1
 ### Step 4. Create flag-file
 
 Create a file “.upgradeversion” inside the directory by calling the command that must be executed by Trendz pod.
-Run the command:
+Run the command (replace 1.14.0 with Trendz version **from** which you are updating):
 ```text
 kubectl exec <POD_NAME> -- sh -c "echo '1.14.0' > /data/.upgradeversion"
-```   
+```
+
 You can get the pod name by the command:
 ```text
 kubectl get pods -l app=trendz-app-pod-label
-```   
-Use another version instead of '1.14.0 if another is needed
+```
 
 ### Step 5. Change image version