doc comment for curls

Author: kapv89

go/samples/http/curls/delete.sh

@@ -1,3 +1,5 @@
+# usage: delete.sh <id>
+
 curl --header "Content-Type: application/json" \
   --request DELETE \
   http://localhost:8080/todos/$1

go/samples/http/curls/index.sh

@@ -1,2 +1,4 @@
+# usage: index.sh
+
 curl http://localhost:8080
 echo

go/samples/http/curls/insert.sh

@@ -1,3 +1,5 @@
+# usage: insert.sh <task>
+
 curl --header "Content-Type: application/json" \
   --request POST \
   --data '{"task":"'$1'"}' \

go/samples/http/curls/list.sh

@@ -1,2 +1,4 @@
+# usage: list.sh
+
 curl http://localhost:8080/todos?search=$1
 echo

go/samples/http/curls/update.sh

@@ -1,3 +1,5 @@
+# usage: update.sh <id> <task>
+
 curl --header "Content-Type: application/json" \
   --request PUT \
   --data '{"task":"'$2'"}' \