chore: README tweak + connection name env var update

Author: leggetter

cli/docker/README.md

@@ -58,10 +58,10 @@ hookdeck  | Dashboard
 hookdeck  | 👉 Inspect and replay events: https://dashboard.hookdeck.com?team_id=tm_zDDhLIPBQw2e
 hookdeck  | 
 hookdeck  | example-webhooks-v3 Source
-hookdeck  | 🔌 Event URL: https://hkdk.events/l5u7nwyghz0gec
+hookdeck  | 🔌 Event URL: https://hkdk.events/irq4hh3eu54hxs
 hookdeck  | 
 hookdeck  | Connections
-hookdeck  | CLI forwarding to /
+hookdeck  | example-webhooks-v3_to_CLI forwarding to /
 hookdeck  | 
 hookdeck  | Getting ready...
 hookdeck  | Ready! (^C to quit)

cli/docker/docker-compose.yml

@@ -20,7 +20,7 @@ services:
           --header 'Accept: application/json' \
           --header 'Authorization: Bearer $HOOKDECK_API_KEY' \
           --data '{
-                    "name": "$HOOKDECK_SOURCE_NAME_to_CLI",
+                    "name": "${HOOKDECK_SOURCE_NAME}_to_CLI",
                     "source": {
                       "name": "$HOOKDECK_SOURCE_NAME",
                       "allowed_http_methods": [