[Enhancement] Docker support Debugging (byebug & pry) and receive emails to MailHog via smtp (#371)

* updated development docker setup

* turned on yarn integrity check

* create test docker compose and update development dockerfile

* create docker Readme.md file

* fix README.md file

* create docker-copmose and dockerfile for production/staging environment setup

* added mailhog to catch email

* remove yarn integrity check in development mode!

* Update Readme.md file to support mailhog inbox

* update link to docker development guide from mail README

* remove .env.development and use .env.example for docker as .env.development was mixing with circleci config

* make the dockerfile configurable like before

* update docker-compose as per suggesion in PR

* create docker setup docs

* Revert accidental deletion

* fix: typo for branding consistency

* fix typo

* update the code as per recommendation in PR

* remove package-lock and add gitignore

* fix vulnerability AND update env for tests to pass

* Fix yarn integrity check across different docker services

* update code based on rubocop and PR suggestions

* remove redundant test docker-compose and dockerfile

* update rails entrypoint, update docs and Gemfile

* [Rubocop] order Gemfile alphabetically

* Reordering Gemfile

docker/entrypoints/rails.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+set -x
+
+# Remove a potentially pre-existing server.pid for Rails.
+rm -rf /app/tmp/pids/server.pid
+rm -rf /app/tmp/cache/*
+
+echo "Waiting for postgres to become ready...."
+
+PGPASSWORD=$POSTGRES_PASSWORD
+PSQL="pg_isready -h $POSTGRES_HOST -p 5432 -U $POSTGRES_USERNAME"
+until $PSQL
+do
+  sleep 2;
+done
+
+echo "Database ready to accept connections."
+
+YARN="yarn check --integrity"
+BUNDLE="bundle check"
+
+until $YARN && $BUNDLE
+do
+  sleep 2;
+done
+
+# Execute the main process of the container
+exec "$@"

docker/entrypoints/webpack.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+rm -rf /app/tmp/pids/server.pid
+rm -rf /app/tmp/cache/*
+
+yarn install --check-files
+
+echo "Waiting for yarn and bundle integrity to match lockfiles...."
+YARN="yarn check --integrity"
+BUNDLE="bundle check"
+
+until $YARN && $BUNDLE
+do
+  sleep 2;
+done
+
+echo "Ready to run webpack development server."
+
+exec "$@"