Docker deploy support

.env.example

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+MYURLS_PORT=8002
+MYURLS_DOMAIN=example.com
+MYURLS_TTL=90

.gitignore

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 .idea
 build/
+
+.env

Dockerfile

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+FROM golang:1.13-alpine AS dependencies 
+WORKDIR /app
+RUN go env -w GO111MODULE="on" && go env -w GOPROXY="https://goproxy.cn,direct"
+
+COPY go.sum go.mod ./
+RUN go mod tidy 
+
+FROM dependencies as build
+WORKDIR /app
+COPY main.go ./
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o myurls main.go 
+
+FROM scratch
+WORKDIR /app
+COPY --from=build /app/myurls ./
+EXPOSE 8002
+ENTRYPOINT ["/app/myurls"]

docker-compose.yaml

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+version: "3"
+services:
+  myurls:
+    build: .
+    container_name: myurls
+    restart: always
+    env_file: .env
+    ports:
+      - "${MYURLS_PORT}:8002"
+    depends_on:
+      - redis
+    entrypoint: ["/app/myurls", "-domain", "${MYURLS_DOMAIN}", "-conn", redis:6379, "-ttl", "${MYURLS_TTL}"]
+
+  redis:
+    image: "redis:5"
+    container_name: redis
+    restart: always
+    expose:
+      - "6379"