Fix: issue #46 remove ".devcontainer" (#47)

* fix: issue #46 - remove ".devcontainer"

* fix: remove redundant test and containers using ".devcontainer"

.github/docker-compose.yml

@@ -104,16 +104,6 @@ services:
     volumes:
       - ..:/workspaces
     entrypoint: [ "./.github/run-tests-go-install.sh" ]
-  # Service mergeability runs all the tests to be merged.
-  mergeability:
-    build:
-      context: ..
-      dockerfile: ./.devcontainer/Dockerfile
-      args:
-        VARIANT: latest
-    volumes:
-      - ..:/workspaces
-    entrypoint: [ "./.github/run-tests-merge.sh" ]
   # Service linuxbrew simply downloads and test-run the released binary via brew.
   linuxbrew:
     image: homebrew/brew

.github/workflows/version-tests.yaml

@@ -47,7 +47,6 @@ jobs:
           docker load --input ${{ env.PATH_CACHE }}/github_v1_17_1.tar
           docker load --input ${{ env.PATH_CACHE }}/github_v1_18_1.tar
           docker load --input ${{ env.PATH_CACHE }}/github_latest_1.tar
-          docker load --input ${{ env.PATH_CACHE }}/github_mergeability_1.tar
 
       - name: Build Docker images if no-exists
         if: steps.cache.outputs.cache-hit != 'true'
@@ -58,7 +57,6 @@ jobs:
           docker pull golang:1.17-alpine
           docker pull golang:1.18-alpine
           docker pull golang:alpine
-          docker pull ghcr.io/keinos/vscode-dev-container-go:latest
           : # Build container images
           docker-compose --file ./.github/docker-compose.yml build
 
@@ -73,7 +71,6 @@ jobs:
           docker save --output ${{ env.PATH_CACHE }}/github_v1_17_1.tar github_v1_17:latest
           docker save --output ${{ env.PATH_CACHE }}/github_v1_18_1.tar github_v1_18:latest
           docker save --output ${{ env.PATH_CACHE }}/github_latest_1.tar github_latest:latest
-          docker save --output ${{ env.PATH_CACHE }}/github_mergeability_1.tar github_mergeability:latest
 
       - name: Run tests on Go 1.15
         run: docker-compose --file ./.github/docker-compose.yml run v1_15
@@ -85,5 +82,3 @@ jobs:
         run: docker-compose --file ./.github/docker-compose.yml run v1_18
       - name: Run tests on latest Go
         run: docker-compose --file ./.github/docker-compose.yml run latest
-      - name: Run tests for mergeability
-        run: docker-compose --file ./.github/docker-compose.yml run mergeability

README.md

@@ -1,29 +1,31 @@
 <!-- markdownlint-disable MD001 MD041 -->
-[![go1.15+](https://img.shields.io/badge/Go-1.15,%2016,%2017,%20latest-blue?logo=go)](https://github.com/KEINOS/dev-go/actions/workflows/go-versions.yml "Supported versions")
+[![go1.15+](https://img.shields.io/badge/Go-1.15,%2016,%2017,%2018,%20latest-blue?logo=go)](https://github.com/KEINOS/dev-go/actions/workflows/go-versions.yml "Supported versions")
 [![Go Reference](https://pkg.go.dev/badge/github.com/KEINOS/Hello-Cobra.svg)](https://pkg.go.dev/github.com/KEINOS/Hello-Cobra#section-documentation "Read generated documentation of the app")
 
 # "Hello, world!" example of Cobra with 100% code coverage
 
 > __Note__ : "`Cobra`" is an awesome framework of Go to help create CLI apps.
 
-**This repo is an example of [Cobra](https://cobra.dev/)'s "`Hello, world!`" with 100% code coverage**.
+__This repo is an example of [Cobra](https://cobra.dev/)'s "`Hello, world!`" with 100% code coverage__.
 
 Including the below to just say "Hello" to the world!
 
 - [CI](./github/workflows/)
-    - Unit tests on Go v1.15 to the latest.
-    - Static analysis, security scan, lint and format check.
-    - Monthly vulnerability scan via CodeQL.
-    - Automated monthly update of `go.mod` and `go.sum` on test-pass.
+  - Unit tests on Go v1.15 to the latest.
+  - Static analysis, security scan, lint and format check.
+  - Monthly vulnerability scan via CodeQL.
+  - Automated monthly update of `go.mod` and `go.sum` on test-pass.
 - Automated [Homebrew release](https://github.com/KEINOS/homebrew-Hello-Cobra) on release push.
 
 ## Searching for the best practices of Cobra
 
-**We all know keeping 100% of code coverage is a myth.** But as a `Golang` and `Cobra` beginner, we wanted a "Hello-world" example with 100% of coverage, which couldn't be found by _googling_ for "[`golang` `cobra` `sample` `example` `hello` `world` `coverage` `100%`](https://www.google.com/search?q=%22golang%22+cobra+sample+example+hello+world+coverage+100%)".
+__We all know keeping 100% of code coverage is a myth__. But as a `Golang` and `Cobra` beginner, we wanted a "Hello-world" example with 100% of coverage, which couldn't be found by _googling_ for "[`golang` `cobra` `sample` `example` `hello` `world` `coverage` `100%`](https://www.google.com/search?q=%22golang%22+cobra+sample+example+hello+world+coverage+100%)".
 
 This repo aims to find the best-practices of `Cobra` by refactoring it on a moment-to-moment basis. But keeping the code coverage as high as possible and less complexity as possible.
 
-- Therefore, this is a forever-[WIP](https://en.wikipedia.org/wiki/Work_in_progress)-repo.<br>So any PR for the better is welcome!!  We will merge it as long as it passess the tests with 100% coverage and not a prank-kind PR.
+- Therefore, this is a forever-[WIP](https://en.wikipedia.org/wiki/Work_in_progress)-repo.
+  So any [PR](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/about-pull-requests) for the better is welcome!!  We will merge it as long as it passess the tests with 100% coverage and not a prank-kind PR.
+  - Branch to PR: `main`
 
 ## Statuses
 
@@ -37,9 +39,11 @@ This repo aims to find the best-practices of `Cobra` by refactoring it on a mome
 ## Note
 
 - This example app supports Homebrew installation. To know how it works see: [.goreleaser.yml](./.goreleaser.yml)
+
     ```bash
     brew install KEINOS/Hello-Cobra/hello-cobra
     ```
+
     ```shellsession
     $ brew install KEINOS/Hello-Cobra/hello-cobra
     ==> Tapping keinos/hello-cobra
@@ -56,23 +60,25 @@ This repo aims to find the best-practices of `Cobra` by refactoring it on a mome
     $ hello-cobra hello foo bar --reverse
     !rab dna oof ,olleH
     ```
+
 - This package auto-detects the app version from the `git` tag if the app was installed via `go install` (on Go v1.16+) or `go get -u` (on Go 1.15). Try:
+
     ```bash
     # For Go 1.16 or above
     cd /tmp
     go install "github.com/KEINOS/Hello-Cobra/hello-cobra@latest"
     hello-cobra --version
     # Output: hello-cobra version v1.3.0
     ```
+
     ```bash
     # For Go 1.15
     cd /tmp
     GO111MODULE="on" go get -u "github.com/KEINOS/Hello-Cobra/hello-cobra@latest"
     hello-cobra --version
     # Output: hello-cobra version v1.3.0
     ```
-- This repo is [GitHub Codespaces](https://github.com/features/codespaces) compatible. Press the `.`(dot) key to open VSCode online. (You may need to register to use Codespaces)
-- This repo is [VS Code + Docker](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.vscode-remote-extensionpack) compatible as well. See the [./.devcontainer/README.md](./.devcontainer/README.md) for more details.
+
 - This repo updates monthly the `go.mod` and `go.sum` files if all the tests succeeds to run in all Go versions (Go v1.15~latest).
 
 ## License