Dockerfile

@@ -1,56 +1,18 @@
 FROM golang:alpine as builder
 
-# ------------------------ #
+ENV GO111MODULE=on
-# (1) install dependencies
-# ------------------------ #
-
-# git is needed for go modules
 RUN apk add git
-
-# upx to shrink executable size
-ARG UPX_VERSION="3.96"
-RUN apk add curl && \
-	curl -L https://github.com/upx/upx/releases/download/v${UPX_VERSION}/upx-${UPX_VERSION}-amd64_linux.tar.xz -o /tmp/upx.tar.xz && \
-	tar -xf /tmp/upx.tar.xz -C /tmp/ && ls /tmp;
-
-# copy sources
 ADD . /app
+
 WORKDIR /app
+RUN go mod download
+RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -o binary
 
-# compile
+FROM alpine:latest as production
-RUN go mod download && \
+RUN mkdir /app
-	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -o /app/binary
+COPY --from=builder /app/binary /app
-
+COPY --from=builder /app/api.json /app
-# shrink executable
-RUN /tmp/upx-${UPX_VERSION}-amd64_linux/upx --brute /app/binary
-
-# create appuser
-ENV USER=appuser
-ENV UID=10001
-
-# See https://stackoverflow.com/a/55757473/12429735RUN
-RUN adduser \
-    --disabled-password \
-    --gecos "" \
-    --home "/nonexistent" \
-    --shell "/sbin/nologin" \
-    --no-create-home \
-    --uid "${UID}" \
-    "${USER}"
-
-FROM scratch as production
-
-# import the user and group files from the builder.
-COPY --from=builder /etc/passwd /etc/passwd
-COPY --from=builder /etc/group /etc/group
-
-# copy executable & config
-COPY --from=builder /app/binary /app/
-COPY --from=builder /app/api.json /app/
-WORKDIR /app/
-
-# Use an unprivileged user.
-USER appuser:appuser
 
+WORKDIR /app
 EXPOSE 4242/tcp
-CMD ["/app/binary"]
+CMD "/app/binary"

README.md

@@ -6,19 +6,13 @@
 go get -u git.xdrm.io/go/tiny-url-ex
 ```
 
-### 2. launch in docker
+### 2. launch the server
 
-Build the image.
+```
-```bash
+$ go run .
-$ docker build -t tiny-url .
 ```
 
-Then you can run the container with :
+Now you can play with it with any regular REST API client at `127.0.0.1:4242`.
-```bash
-$ docker run -p 127.0.0.1:8888:4242 tiny-url
-```
-
-You can now play with it with any regular REST API client at `127.0.0.1:8888`.
 
 ##### 1. Get an authentication token
 

main.go

@@ -13,7 +13,7 @@ import (
 
 func main() {
 
-	listenTo := ":4242"
+	listenTo := "127.0.0.1:4242"
 
 	// 1. build server
 	log.Printf("[server] building")