added dockerfile

Dockerfile

@@ -0,0 +1,27 @@
+# syntax=docker/dockerfile:1.2
+FROM golang:1.19-bullseye as builder
+LABEL maintainer="[email protected]"
+ENV DOCKER_BUILDKIT=1
+#
+WORKDIR /app
+COPY go.mod ./
+COPY main.go ./
+#
+#COPY go.sum ./
+#RUN go mod tidy
+#RUN go mod graph | awk '{if ($1 !~ "@") print $2}' | xargs go get
+RUN --mount=type=cache,target=/go/pkg/mod \
+   --mount=type=cache,target=/root/.cache/go-build go mod tidy
+#ARG VERSION
+RUN --mount=type=cache,target=/go/pkg/mod \
+   --mount=type=cache,target=/root/.cache/go-build \
+   CGO_ENABLED=0 go build -installsuffix cgo -ldflags "-X main.version=1" -o ./scaffold .
+#
+#
+FROM phusion/baseimage:focal-1.2.0
+#
+COPY --from=builder /app /app
+WORKDIR /app
+#
+CMD [ "./scaffold" ]
+#