Case 1：使用代码构建，部署失败 - 服务无法正常拉起

Dockerfile

# Use the official golang image to create a build artifact
FROM golang:1.13 as builder
# Create app directory
RUN mkdir /app
# Add file to /app/
ADD . /app/
# Build the binary
WORKDIR /app
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
# Run service on container startup
FROM alpine:latest
WORKDIR /app
COPY --from=builder /app/main .
CMD ["/app/main"]

fail.go

package main
import (
    "fmt"
    "log"
    "net/http"
    "os"
)
func handler(w http.ResponseWriter, r *http.Request) {
    log.Print("Received a request.")
    fmt.Fprintf(w, "Hello, Welcome to CloudBase!\n")
}
func main() {
    panic("this is fail demo test") // this is show panic error !!!
    log.Print("Server started.")
    http.HandleFunc("/", handler)
    port := os.Getenv("PORT")
    if port == "" {
        port = "80"
    }
    log.Fatal(http.ListenAndServe(fmt.Sprintf(":%s", port), nil))
}