init

Dockerfile

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+# --- Builder Stage ---
+FROM golang:1.24-alpine AS builder
+
+# Arbeitsverzeichnis
+WORKDIR /app
+
+# Go-Module laden
+COPY go.mod ./
+RUN go mod download
+
+# Quellcode
+COPY . .
+
+# Binary bauen (statisch, kleiner)
+RUN CGO_ENABLED=0 GOOS=linux go build -o subnetcalc .
+
+# --- Runtime Stage ---
+FROM alpine:3.22
+
+WORKDIR /app
+
+# Binary vom Builder kopieren
+COPY --from=builder /app/subnetcalc .
+
+# Exponiere Port für Webinterface
+EXPOSE 8080
+
+# Standardkommando: immer Web-Modus starten
+ENTRYPOINT ["./subnetcalc", "-web", ":8080"]