refactor: change Cloudlfare DDNS config to env-based

cfddns/.env.example

@@ -0,0 +1,15 @@
+CLOUDFLARE_API_TOKEN=YOUR_CLOUDFLARE_API_TOKEN
+DOMAINS=example.com,dns.example.com,mc.example.com,auth.example.com,ssh.example.com
+IP4_DOMAINS=
+IP6_DOMAINS=
+IP4_PROVIDER=cloudflare.trace
+IP6_PROVIDER=none # change if you want to update AAAA
+UPDATE_CRON=@every 5m
+UPDATE_ON_START=true
+DELETE_ON_STOP=false
+DELETE_ON_FAILURE=true
+TTL=1
+PROXIED=!is(dns.example.com) && !is(mc.example.com) && !is(ssh.example.com)
+EMOJI=true
+UPTIMEKUMA=https://uptime-kuma.example.com/api/push/AsaSDFGFkfklaFALSKffkfFKfkfkfkFK?status=up&msg=OK&ping=
+REJECT_CLOUDFLARE_IPS=true