- Move most of the stuff for backwards compatibility support into one class

- Added random port logic
- Updated wait wtrategies
- API alignments to make it similar to other official implementations
- ...

src/Modules/PostgresContainer.php

@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Testcontainers\Modules;
+
+use Testcontainers\Container\GenericContainer;
+use Testcontainers\Wait\WaitForExec;
+
+class PostgresContainer extends GenericContainer
+{
+    public function __construct(
+        string $version = 'latest',
+        public readonly string $username = 'test',
+        public readonly string $password = 'test',
+        public readonly string $database = 'test'
+    ) {
+        parent::__construct('postgres:' . $version);
+        $this->withExposedPorts(5432);
+        $this->withEnvironment('POSTGRES_USER', $this->username);
+        $this->withEnvironment('POSTGRES_PASSWORD', $this->password);
+        $this->withEnvironment('POSTGRES_DB', $this->database);
+        $this->withWait(new WaitForExec(["pg_isready", "-h", "127.0.0.1", "-U", $this->username]));
+    }
+
+    /**
+     *  @deprecated Use constructor instead
+     *  Left for backward compatibility
+     */
+    public static function make(string $version = 'latest', string $dbPassword = 'root'): self
+    {
+        return new self(
+            version: $version,
+            password: $dbPassword
+        );
+    }
+
+    public function withPostgresUser(string $username): self
+    {
+        $this->withEnvironment('POSTGRES_USER', $username);
+
+        return $this;
+    }
+
+    public function withPostgresDatabase(string $database): self
+    {
+        $this->withEnvironment('POSTGRES_DB', $database);
+
+        return $this;
+    }
+}