Update

Dockerfile

@@ -0,0 +1,25 @@
+FROM golang:1.24-alpine AS build
+WORKDIR /app
+
+# Optional: git + certs for private modules; cache modules and build cache
+RUN apk add --no-cache git ca-certificates
+
+# Go deps first (better layer caching)
+COPY go.mod go.sum ./
+RUN --mount=type=cache,target=/go/pkg/mod go mod download
+
+# App sources (incl. templates for go:embed)
+COPY . .
+
+# Build static binary (templates are embedded via //go:embed)
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
+    go build -trimpath -ldflags "-s -w" -o /out/pgpkeygen ./
+
+### Runtime stage (distroless)
+FROM gcr.io/distroless/static:nonroot
+WORKDIR /app
+COPY --from=build /out/pgpkeygen /app/pgpkeygen
+EXPOSE 8080
+USER nonroot:nonroot
+ENTRYPOINT ["/app/pgpkeygen"]