Add Var.CI bot config

.varci.yml

@@ -0,0 +1,46 @@
+ruleset:
+
+  respond_to_me:
+
+    name: Respond to me when I comment mentioning @VarCI-bot
+    events: [ issue_comment ]
+    when:
+      - action = "created"
+      - user.login = "hollomancer"
+      - body contains "@VarCI-bot"
+    comment: |
+      Perfect @{{ user.login }} - now replace the first two rules with your own!
+
+      If you wish to keep the third rule, you can merge by starting a comment with "LGTM".
+
+      Please see the following resources if you get stuck - best of luck!
+
+      - [Documentation](https://var.ci/docs)
+      - [Support](https://var.ci/support)
+
+  merge_for_me:
+
+    name: Merge pull requests for me when I start a comment with "LGTM"
+    events: [ issue_comment ]
+    when:
+      - action = "created"
+      - user.login = "hollomancer"
+      - body matches "/^LGTM/"
+    merge: true
+
+  welcome_me:
+
+    name: Introduce me to VarCI when I open a pull request
+    events: [ pull_request ]
+    when:
+      - action = "opened"
+      - user.login = "hollomancer"
+    comment: |
+      Welcome to VarCI @{{ user.login }}!
+
+      Continue pushing changes to the config in this branch and I'll validate the changes.
+
+      You can also test out new rules in your pull requests before merging them.
+
+      For example, try triggering the second rule by mentioning me (@VarCI-bot) right now!
+