set working directory for CI to match project structure

Author: galllee

.github/workflows/ci.yml

@@ -7,6 +7,9 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    defaults:
+        run:
+            working-directory: todomate-clone
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-java@v3