ci: test CTFd connection on setup endpoint

.github/workflows/ci.yaml

@@ -41,7 +41,7 @@ jobs:
           max_attempts=60
           base_url="http://localhost:8000"
           for ((i=0; i<$max_attempts; i++)); do
-            if curl --head --fail --silent --show-error "$base_url" >/dev/null; then
+            if curl --head --fail --silent --show-error "$base_url/setup" >/dev/null; then
               echo "Server is up and running!"
               break
             else
@@ -57,7 +57,7 @@ jobs:
       - name: Setup CTFd
         uses: ctfer-io/ctfd-setup@dc0b1f042a99b5a4abc04e69e850f483ca139557 # v1.1.8
         with:
-          url: http://localhost:8000
+          url: 'http://localhost:8000'
           appearance_name: TFP-CTFd
           appearance_description: Terraform Provider CTFd.
           mode: teams