docker and workflow

Dockerfile

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+# Stage 1: Build Go binary using lightweight Alpine
+FROM golang:1.24-alpine AS builder
+
+# Set workdir
+WORKDIR /app
+
+# Copy go.mod/go.sum and download dependencies
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Build Go binary
+RUN GOOS=linux go build -o koito-multi-proxy .
+
+# Stage 2: Runtime on Ubuntu 24.04
+FROM ubuntu:24.04
+
+# Avoid interactive prompts during apt installs
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Copy Go binary from builder stage
+COPY --from=builder /app/koito-multi-proxy /usr/local/bin/koito-multi-proxy
+
+# Entrypoint
+ENTRYPOINT ["koito-multi-proxy"]