Dimas Maulana

In this article, we will walk through the creation of an optimized Dockerfile for building and running a Go application. This Dockerfile will focus on building only the binary of the Go application, resulting in a smaller and more efficient Docker image.

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## Dockerfile for Building a Go Application

```Dockerfile
# Stage 1: Build the Go Binary
FROM golang:1.17 as builder

# Set the working directory inside the container
WORKDIR /app

# Copy the Go application source code into the container
COPY . .

# Set environment variables
ENV CGO_ENABLED=0

# Fetch dependencies and build the Go binary
RUN go get -d -v ./...
RUN go build -o /tmp/api-server .

# Stage 2: Create a minimal runtime image
FROM scratch

# Copy the binary from the builder stage into the minimal image
COPY --from=builder /tmp/api-server /usr/bin/api-server

# Define the command to run when the container starts
CMD ["api-server", "start"]

In this Dockerfile, we use a multi-stage build to optimize the final Docker image. Here’s a breakdown of what each section does:

In a React application, it’s common to want to scroll to the top of the page instantly after a router transition, such as when navigating to a new page or route. This provides a smooth user experience and ensures that the user starts reading the new content from the top of the page. To achieve this, you can use JavaScript’s window.scrollTo() method with the behavior: 'instant' option. In this article, we’ll explore how to implement this behavior in a React application.

In Git, there may be situations where you need to update or correct author information on all commits, such as changing email addresses or fixing incorrect names. This guide will explain how to rename authors on all commits using the git-filter-repo tool.

Requirements

1. git-filter-repo: You can install it from the official repository at https://github.com/newren/git-filter-repo.

Procedure

Step 1: Create a .mailmap File

Create a file named .mailmap in the root directory of your Git repository. This file will map the old author information to the new author information. The correct format for each entry is as follows:

In Bash scripting, there are various ways to retrieve yesterday’s date on both Mac and Ubuntu systems. Below, we’ll demonstrate two different methods for each operating system.

Mac:

Method 1: Using date with -v option

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yesterday=$(date -v-1d +%F)
echo "Yesterday's date on Mac: $yesterday"

In this method, we use the -v option with the date command to subtract 1 day from the current date and format it as %F, which gives the date in YYYY-MM-DD format.

It looks like you’re trying to use the eval command in a Bash script to export variables loaded from a dotenv file using the shdotenv tool. This is a common practice for setting environment variables from a configuration file. Here’s an explanation of what this code does:

1. shdotenv is likely a command or script that reads a dotenv file (usually named .env) and sets environment variables based on the key-value pairs defined in that file. Dotenv files are commonly used to store configuration variables for applications.

In Go (Golang), the interface{} type is an empty interface that can hold values of any type. It is often used when you need to work with values of unknown or varied types. Type assertions allow you to extract and work with the underlying concrete type of a value stored in an interface{}. Here, we’ll explore how to use interface{} and type assertions in Go.

Storing Different Types in an interface{}

You can store values of different types in an interface{}. Here’s an example: