:gear: Adds launch.json

.vscode/launch.json

@@ -0,0 +1,17 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Serve Jekyll Site",
+      "type": "shell",
+      "request": "launch",
+      "command": "bundle exec jekyll serve --livereload",
+      "cwd": "${workspaceFolder}",
+      "presentation": {
+        "reveal": "always",
+        "panel": "new"
+      },
+      "problemMatcher": []
+    }
+  ]
+}