From 8d3b2658f04076185f6e4be3d13e5ba5172df6da Mon Sep 17 00:00:00 2001
From: Quentin McGaw <quentin.mcgaw@gmail.com>
Date: Thu, 18 Oct 2018 14:24:57 +0200
Subject: [PATCH] Uses a simple Go binary server in Scratch

Downsize from 45.5MB to 29.6MB
---
 Dockerfile | 19 ++++++++++++++-----
 main.go    | 13 +++++++++++++
 2 files changed, 27 insertions(+), 5 deletions(-)
 create mode 100644 main.go

diff --git a/Dockerfile b/Dockerfile
index 65661d3..f7f6813 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,13 +6,22 @@ WORKDIR /stackedit
 RUN npm install
 RUN npm run build
 
-FROM nginx:1.15-alpine
+FROM golang:alpine AS server
+RUN apk --update add git build-base upx
+WORKDIR /go/src/app
+COPY main.go ./
+RUN CGO_ENABLED=0 GOOS=linux go build -a -ldflags="-s -w" -installsuffix cgo -o server . && \
+    upx -v --best --overlay=strip server && \
+    upx -t server
+
+FROM scratch
 LABEL maintainer="quentin.mcgaw@gmail.com" \
       description="StackEdit server in a lightweight Docker container" \
-      download="15.6MB" \
-      size="45.5MB" \
+      size="29.6MB" \
       ram="7MB" \
       cpu_usage="Very low" \
       github="https://github.com/qdm12/stackedit-docker"
-COPY --from=stackedit /stackedit/dist /usr/share/nginx/html/
-ENTRYPOINT nginx -g "daemon off;"
+EXPOSE 80
+COPY --from=stackedit /stackedit/dist /
+COPY --from=server /go/src/app/server /server
+ENTRYPOINT [ "/server" ]
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..7357f2c
--- /dev/null
+++ b/main.go
@@ -0,0 +1,13 @@
+package main
+
+import (
+	"log"
+	"net/http"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, r.URL.Path[1:])
+	})
+	log.Fatal(http.ListenAndServe(":80", nil))
+}