chore: sync files from devops-roast/.github (#1)

* chore: sync files from `devops-roast/.github`

* chore: auto fix changes reported by pre-commit [skip pre-commit]

---------

Co-authored-by: devops-roast-bot[bot] <227748137+devops-roast-bot[bot]@users.noreply.github.com>
Co-authored-by: shmileee <9083008+shmileee@users.noreply.github.com>

Author: devops-roast-bot[bot]

.github/renovate.json

@@ -0,0 +1,4 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["github>devops-roast/renovate-config"]
+}

.markdownlintrc

@@ -0,0 +1,20 @@
+{
+  "default": true,
+  "first-header-h1": false,
+  "first-line-h1": false,
+  "line_length": false,
+  "no-multiple-blanks": false,
+  "fenced-code-language": true,
+  "no-duplicate-header": {
+    "siblings_only": true
+  },
+  "code-block-style": {
+    "style": "fenced"
+  },
+  "MD033": {
+    "allowed_elements": [
+      "details",
+      "summary"
+    ]
+  }
+}

CNAME

@@ -1 +1 @@
-devops-roast.com
+devops-roast.com