Add config, create woodpeckerci workflow

.woodpecker/.renovate.yml

@@ -0,0 +1,25 @@
+variables:
+  - &reno_image 'renovate/renovate:37.146.0'
+
+when:
+  event: [push, manual, cron]
+  cron: "4hours"
+
+steps:
+  - name: Renovate - Validate config
+    image: *reno_image
+    # https://github.com/renovatebot/renovate/discussions/15049
+    commands:
+      - unset GIT_COMMITTER_NAME GIT_COMMITTER_EMAIL GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL
+      - renovate-config-validator
+  
+  - name: Renovate
+    image: *reno_image
+    # https://github.com/renovatebot/renovate/discussions/15049
+    commands:
+      - unset GIT_COMMITTER_NAME GIT_COMMITTER_EMAIL GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL
+      - renovate
+  
+    environment:
+      RENOVATE_TOKEN:
+        from_secret: renovate_token

config.js

@@ -0,0 +1,14 @@
+module.exports = {
+  platform: "gitea",
+  endpoint: "https://git.seanomik.net/api/v1/",
+  gitAuthor: "Renovate Bot <renovatebot@seanomik.net>",
+  username: "Renovate",
+  autodiscover: true,
+  onboardingConfig: {
+    $schema: "https://docs.renovatebot.com/renovate-schema.json",
+    extends: ["config:base"],
+  },
+  optimizeForDisabled: true,
+  persistRepoData: true,
+  repositories: [],
+};