Docker Deployments

Multi-Stage Builds

FROM golang:1.22-alpine AS builder
WORKDIR /app
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN CGO_ENABLED=0 go build -o server ./cmd/server

FROM alpine:3.19
RUN apk --no-cache add ca-certificates
COPY --from=builder /app/server /server
EXPOSE 8080
CMD ["/server"]

Health Checks

HEALTHCHECK --interval=30s --timeout=3s \
  CMD wget -qO- http://localhost:8080/health || exit 1

Non-Root User

Always run containers as non-root. Create a dedicated user in the Dockerfile.

Image Size

Alpine base images, static binaries, .dockerignore for node_modules and .git.