feat: Add VS Code development configurations and update Docker Compose service ports and frontend environment variable.

.vscode/launch.json

@@ -0,0 +1,34 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "name": "Frontend",
+            "request": "launch",
+            "cwd": "${workspaceFolder}/frontend",
+            "runtimeExecutable": "npm",
+            "runtimeArgs": [
+                "run",
+                "dev"
+            ],
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "env": {
+                "VITE_BASE_URL": "http://localhost:8080/api"
+            }
+        },
+        {
+            "type": "java",
+            "name": "Backend",
+            "request": "launch",
+            "mainClass": "com.todo.backend.BackendApplication",
+            "projectName": "backend",
+            "env": {
+                "SPRING_DATASOURCE_URL": "jdbc:postgresql://localhost:5433/tododb",
+                "SPRING_DATASOURCE_USERNAME": "postgres",
+                "SPRING_DATASOURCE_PASSWORD": "postgres"
+            }
+        }
+    ]
+}