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/docker/Dockerfile

@@ -0,0 +1,27 @@
+# tinqs/ci docker — Docker builds (platform image, bot image)
+# Used by: build (platform), deploy-bot
+# runs-on: docker
+# Based on docker:dind for Docker-in-Docker support.
+
+FROM docker:29-dind
+
+RUN apk add --no-cache \
+    bash git curl wget unzip tar \
+    ca-certificates openssh-client \
+    build-base s6 tzdata
+
+# AWS CLI
+RUN curl -fsSL https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip -o /tmp/awscli.zip && \
+    unzip -q /tmp/awscli.zip -d /tmp && \
+    /tmp/aws/install && \
+    rm -rf /tmp/awscli.zip /tmp/aws
+
+# Go (needed for platform Docker builds that compile inside container)
+ARG GO_VERSION=1.26.2
+RUN curl -fsSL "https://go.dev/dl/go${GO_VERSION}.linux-amd64.tar.gz" | tar -C /usr/local -xz
+ENV PATH="/usr/local/go/bin:/go/bin:${PATH}"
+ENV GOPATH="/go"
+
+RUN docker --version && aws --version && go version
+
+WORKDIR /workspace