tinqs/ci — composite actions + Lambda dispatcher for Spot CI runners

Actions: checkout, setup-go, setup-node, setup-aws
Dispatcher: Lambda → EC2 Spot (ephemeral, self-terminating)
Images: base, go, node, docker, deploy, godot

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

images/node/Dockerfile

@@ -0,0 +1,13 @@
+# tinqs/ci node — Node.js builds (docs, frontend)
+# Used by: deploy-docs
+# runs-on: node
+
+ARG BASE_IMAGE=tinqs-runner-base:latest
+FROM ${BASE_IMAGE}
+
+ARG NODE_VERSION=22
+
+RUN apk add --no-cache nodejs npm && \
+    npm install -g pnpm
+
+RUN node --version && pnpm --version