fix build file and caddyfile template

Caddyfile.tmpl

@@ -1,9 +1,8 @@
-{
-	acme_dns desec {
-		token {env.GANDI_BEARER_TOKEN}
-	}
-
-    test.com {
-        reverse_proxy localhost:8080
+example.com {
+    tls {
+        dns desec {
+            token {env.DESEC_TOKEN}
+        }
     }
+    reverse_proxy localhost:8080
 }

caddy.build

@@ -2,6 +2,6 @@
 Description=Build caddy image with desec.io DNS plugin
 
 [Build]
-File=%h/container/caddy/Containerfile
+File=./Containerfile
 ImageTag=caddy-gandi:latest
 SetWorkingDirectory=unit