Update edge install instructions

- changed instructions

application/src/main/data/json/edge/instructions/install/docker/instructions.md

@@ -37,16 +37,18 @@ version: '3.8'
 services:
   mytbedge:
     restart: always
-    image: "thingsboard/tb-edge:3.9.1EDGE"
+    image: "thingsboard/tb-edge:${TB_EDGE_VERSION}"
     ports:
       - "8080:8080"
       - "1883:1883"
       - "5683-5688:5683-5688/udp"
     environment:
       SPRING_DATASOURCE_URL: jdbc:postgresql://postgres:5432/tb-edge
-      CLOUD_ROUTING_KEY: PUT_YOUR_EDGE_KEY_HERE # e.g. 19ea7ee8-5e6d-e642-4f32-05440a529015
-      CLOUD_ROUTING_SECRET: PUT_YOUR_EDGE_SECRET_HERE # e.g. bztvkvfqsye7omv9uxlp
-      CLOUD_RPC_HOST: PUT_YOUR_CLOUD_IP # e.g. 192.168.1.1 or demo.thingsboard.io
+      CLOUD_ROUTING_KEY: ${CLOUD_ROUTING_KEY}
+      CLOUD_ROUTING_SECRET: ${CLOUD_ROUTING_SECRET}
+      CLOUD_RPC_HOST: ${BASE_URL}
+      CLOUD_RPC_PORT: ${CLOUD_RPC_PORT}
+      CLOUD_RPC_SSL_ENABLED: ${CLOUD_RPC_SSL_ENABLED}
     volumes:
       - tb-edge-data:/data
       - tb-edge-logs:/var/log/tb-edge

application/src/main/data/json/edge/instructions/install/ubuntu/instructions.md

@@ -99,11 +99,11 @@ To configure ThingsBoard Edge, you  can use the following command to automatical
 
 ```bash
 sudo sh -c 'cat <<EOL >> /etc/tb-edge/conf/tb-edge.conf
-export CLOUD_ROUTING_KEY=<PUT_YOUR_EDGE_KEY_HERE>
-export CLOUD_ROUTING_SECRET=<PUT_YOUR_EDGE_SECRET_HERE>
-export CLOUD_RPC_HOST=demo.thingsboard.io
-export CLOUD_RPC_PORT=7070
-export CLOUD_RPC_SSL_ENABLED=false
+export CLOUD_ROUTING_KEY=${CLOUD_ROUTING_KEY}
+export CLOUD_ROUTING_SECRET=${CLOUD_ROUTING_SECRET}
+export CLOUD_RPC_HOST=${BASE_URL}
+export CLOUD_RPC_PORT=${CLOUD_RPC_PORT}
+export CLOUD_RPC_SSL_ENABLED=${CLOUD_RPC_SSL_ENABLED}
 EOL'
 {:copy-code}
 ```