Create a basic application

Gemfile

@@ -2,5 +2,7 @@
 
 source 'https://rubygems.org'
 
+gem 'connection_pool', '~> 2.3'
+gem 'pg', '~> 1.4'
 gem 'puma', '~> 6.0'
 gem 'sinatra', '~> 3.0'

Gemfile.lock

@@ -1,9 +1,11 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    connection_pool (2.3.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.8)
+    pg (1.4.5)
     puma (6.0.2)
       nio4r (~> 2.0)
     rack (2.2.6.2)
@@ -21,6 +23,8 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  connection_pool (~> 2.3)
+  pg (~> 1.4)
   puma (~> 6.0)
   sinatra (~> 3.0)
 

main.rb

@@ -0,0 +1,21 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require 'connection_pool'
+require 'pg'
+require 'sinatra'
+
+$DB_POOL = ConnectionPool.new size: 5, timeout: 5 do
+  PG.connect(
+    host: 'pg.causa-arcana.com',
+    dbname: 'leqsikoni',
+    user: 'leqsikoni',
+    password: 'ggeucene3ou7mqh2upehhm52tfp5bkcj',
+  )
+end
+
+get '/' do
+  $DB_POOL.with do |db_conn|
+    db_conn.exec('SELECT * FROM languages').to_a.inspect
+  end
+end