Dockerfile

FROM golang:1.26-alpine AS builder
WORKDIR /app
COPY go.mod go.sum ./
RUN go mod download
COPY . .
ARG VERSION=dev
RUN CGO_ENABLED=0 GOOS=linux go build \
    -ldflags="-s -w" \
    -o spa-server \
    ./cmd/spa-server

FROM alpine:3.21
RUN apk add --no-cache ca-certificates tzdata
WORKDIR /app
COPY --from=builder /app/spa-server .
# Mount your SPA dist/ here, or COPY it in a downstream Dockerfile.
VOLUME ["/srv/www"]
EXPOSE 8080
ENTRYPOINT ["/app/spa-server"]
feat(spa-server): initial implementation — SPA/PWA container server (v1.0.0) Introduces code.nochebuena.dev/einherjar/spa-server — a container-first HTTP server for single-page applications and progressive web apps. Produces a Docker base image; downstream SPA Dockerfiles require only a single COPY instruction. Interfaces and types (CT-6: one TypeSpec per file): - Config — Port (EINHERJAR_SPA_PORT, default 8080) and StaticDir (EINHERJAR_SPA_STATIC_DIR, default /srv/www); parsed via os.Getenv - Server — implements lifecycle.Component; registered with launcher.New Implementation: - NewServer(logger, cfg) Server — returns a lifecycle-managed HTTP server - OnInit: builds http.NewServeMux with GET /health and / routes - OnStart: binds TCP listener synchronously via net.Listen (port conflicts surface immediately), then serves in a background goroutine - OnStop: graceful shutdown via http.Server.Shutdown with 10s timeout spa.NewHandler(logger, staticDir) http.Handler: - Uses http.Dir.Open for path sanitisation (prevents directory traversal) - File exists and is not a directory → served by http.FileServer - File missing or is a directory → serves index.html (SPA router owns all routes) - Directory listing is disabled health.NewHandler(logger) http.Handler: - Always responds 200 {"status":"UP","components":{}} - Wire format matches web/health.Response without importing the web module - No external checks — process reachability is the only meaningful health signal Config (EINHERJAR_SPA_* env vars): Port(8080), StaticDir(/srv/www) Docker: - Multi-stage: golang:1.26-alpine builder → alpine:3.21 runtime - Image published as: code.nochebuena.dev/einherjar/spa-server:v1.0.0 code.nochebuena.dev/einherjar/spa-server:latest - VOLUME ["/srv/www"] declared; consumer overrides via COPY or volume mount No external dependencies beyond contracts, core, and the Go standard library. 2026-06-02 18:49:05 +00:00			`FROM golang:1.26-alpine AS builder`
			`WORKDIR /app`
			`COPY go.mod go.sum ./`
			`RUN go mod download`
			`COPY . .`
			`ARG VERSION=dev`
			`RUN CGO_ENABLED=0 GOOS=linux go build \`
			`-ldflags="-s -w" \`
			`-o spa-server \`
			`./cmd/spa-server`

			`FROM alpine:3.21`
			`RUN apk add --no-cache ca-certificates tzdata`
			`WORKDIR /app`
			`COPY --from=builder /app/spa-server .`
			`# Mount your SPA dist/ here, or COPY it in a downstream Dockerfile.`
			`VOLUME ["/srv/www"]`
			`EXPOSE 8080`
			`ENTRYPOINT ["/app/spa-server"]`