What does the service ultimately run on? What Docker images did you use?

The service ultimately runs inside a Docker container that contains a compiled binary application in Go and all necessary dependencies. Typically, multi-stage Docker builds are used for Golang services: in the first stage (build stage), the official golang image, such as golang:1.20-alpine, is used to compile the application, and in the second stage — a minimal image, such as scratch or alpine, into which only the compiled binary is copied. This allows for a lightweight and secure image for production.

Example Dockerfile:

# Build stage
FROM golang:1.20-alpine AS builder
WORKDIR /app
COPY . .
RUN go build -o myservice

# Final image
FROM alpine:latest
WORKDIR /app
COPY --from=builder /app/myservice .
CMD ["./myservice"]

Thus, the service runs on a minimal Linux image with a Go application, ensuring quick startup and small image sizes.