Update docker-compose.yaml

Update example docker compose file

deployments/docker/docker-compose.yaml

@@ -1,35 +1,34 @@
 version: "3.9"
+x-common-variables: &common-variables
+  # Add variables here to add them to all agents
+  AGENT_HUB_KEY: "xxxxx" # The access key linked to your account in Kerberos Hub.
+  AGENT_HUB_PRIVATE_KEY: "xxxxx" # The secret access key linked to your account in Kerberos Hub.
+  # find full list of environment variables here: https://github.com/kerberos-io/agent#override-with-environment-variables
 services:
   kerberos-agent1:
     image: "kerberos/agent:latest"
     ports:
       - "8081:80"
     environment:
-      - AGENT_NAME=agent1
-      - AGENT_CAPTURE_IPCAMERA_RTSP=rtsp://x.x.x.x:554/Streaming/Channels/101
-      - AGENT_HUB_KEY=xxx
-      - AGENT_HUB_PRIVATE_KEY=xxx
-      - AGENT_CAPTURE_CONTINUOUS=true
-      - AGENT_CAPTURE_PRERECORDING=10
-      - AGENT_CAPTURE_POSTRECORDING=10
-      - AGENT_CAPTURE_MAXLENGTH=60
-      - AGENT_CAPTURE_PIXEL_CHANGE=150
-      # find full list of environment variables here: https://github.com/kerberos-io/agent#override-with-environment-variables
+      <<: *common-variables
+      AGENT_NAME: agent1
+      AGENT_CAPTURE_IPCAMERA_RTSP: rtsp://username:password@x.x.x.x/Streaming/Channels/101 # Hikvision camera RTSP url example
+      AGENT_KEY: "1"
   kerberos-agent2:
     image: "kerberos/agent:latest"
     ports:
       - "8082:80"
     environment:
-      - AGENT_NAME=agent2
-      - AGENT_CAPTURE_IPCAMERA_RTSP=rtsp://x.x.x.x:554/Streaming/Channels/101
-      - AGENT_HUB_KEY=yyy
-      - AGENT_HUB_PRIVATE_KEY=yyy
+      <<: *common-variables
+      AGENT_NAME: agent2
+      AGENT_CAPTURE_IPCAMERA_RTSP: rtsp://username:password@x.x.x.x/channel1 # Linksys camera RTSP url example
+      AGENT_KEY: "2"
   kerberos-agent3:
     image: "kerberos/agent:latest"
     ports:
       - "8083:80"
     environment:
-      - AGENT_NAME=agent3
-      - AGENT_CAPTURE_IPCAMERA_RTSP=rtsp://x.x.x.x:554/Streaming/Channels/101
-      - AGENT_HUB_KEY=zzz
-      - AGENT_HUB_PRIVATE_KEY=zzz
+      <<: *common-variables
+      AGENT_NAME: agent3
+      AGENT_CAPTURE_IPCAMERA_RTSP: rtsp://username:password@x.x.x.x/cam/realmonitor?channel=1&subtype=1 # Dahua camera RTSP url example
+      AGENT_KEY: "3"