Dockerfile

# Stage 1: Build the Go executable
FROM golang:latest AS builder

# Set the Current Working Directory inside the container
WORKDIR /app

# Copy go mod and sum files
COPY go.mod go.sum ./

# Download all dependencies. Dependencies will be cached if the go.mod and go.sum files are not changed
RUN go mod download

# Copy the source from the current directory to the Working Directory inside the container
COPY . .

# Build the Go app
RUN go build -o /root/cronapp .

# Stage 2: Create the final image
FROM alpine:latest

# Set the Current Working Directory inside the container
WORKDIR /root/

# Install glibc on Alpine
RUN apk --no-cache add ca-certificates wget && \
    wget -q -O /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub && \
    wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.35-r0/glibc-2.35-r0.apk && \
    apk add --force glibc-2.35-r0.apk && \
    rm glibc-2.35-r0.apk

# Copy the Pre-built binary file from the previous stage
COPY --from=builder /root/cronapp /root/cronapp

# Copy the entrypoint script
COPY run.sh /root/

# Set executable permissions for the entrypoint script
RUN chmod +x /root/run.sh
RUN chmod +x /root/cronapp

# Run your Go application
CMD ["./run.sh"]