Docker image support

1. Add build docker image in makefile
2. Add use with docker in readme

Dockerfile

@@ -0,0 +1,26 @@
+FROM golang:1.20 as builder
+
+ARG TARGETOS
+ARG TARGETARCH
+ENV GOPROXY=https://goproxy.io,direct
+
+WORKDIR /
+
+COPY go.mod go.mod
+COPY go.sum go.sum
+COPY pkg pkg
+COPY main.go main.go
+
+RUN CGO_ENABLED=1 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o virtuallan main.go
+
+FROM alpine:3.19
+
+WORKDIR /
+
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/g' /etc/apk/repositories
+RUN apk add --no-cache gcompat
+
+COPY config config
+COPY static static
+COPY --from=builder virtuallan virtuallan
+CMD /virtuallan server -d /config

Makefile

@@ -1,4 +1,6 @@
 .DEFAULT_GOAL := build
+IMG ?= virtuallan:latest
+CONTAINER_TOOL ?= docker
 
 .PHONY: gen
 gen:
@@ -11,3 +13,7 @@ build: gen
 .PHONY: clean
 clean:
 	rm -rf virtuallan
+
+.PHONY: build-docker
+build-docker: gen
+	$(CONTAINER_TOOL) build -t ${IMG} .

README.md

@@ -27,6 +27,14 @@ go build -o virtuallan main.go
 
 go generate will generate an random aes key
 
+## Use with docker
+
+**Build**
+>IMG=\<your image name>:\<tag> make build-docker
+
+**Run docker image as server**
+>docker run --privileged=true -d --restart always -p 6123:6123/udp -p 8000:8000 quay.io/shawnlu0127/virtuallan:20240507
+
 ## Getting started
 
 **Server**
@@ -88,6 +96,7 @@ OPTIONS:
 ### Try it out
 
 If enable web, it will start a http server on port 8000. Check the endpoints in index page.
+
 ![monitor](./docs/statics/endpoints.png)
 
 Links of virtuallan server