add phalcon ext (#1806)

* add phalcon ext

env-example

@@ -37,6 +37,11 @@ COMPOSE_PROJECT_NAME=laradock
 # Select a PHP version of the Workspace and PHP-FPM containers (Does not apply to HHVM). Accepted values: 7.2 - 7.1 - 7.0 - 5.6
 PHP_VERSION=7.2
 
+### Phalcon Version ###########################################
+
+# Select a Phalcon version of the Workspace and PHP-FPM containers (Does not apply to HHVM). Accepted values: 3.4.0+
+PHALCON_VERSION=3.4.1
+
 ### PHP Interpreter #######################################
 
 # Select the PHP Interpreter. Accepted values: hhvm - php-fpm
@@ -114,6 +119,7 @@ WORKSPACE_INSTALL_IMAGEMAGICK=false
 WORKSPACE_INSTALL_TERRAFORM=false
 WORKSPACE_INSTALL_DUSK_DEPS=false
 WORKSPACE_INSTALL_PG_CLIENT=false
+WORKSPACE_INSTALL_PHALCON=false
 WORKSPACE_INSTALL_SWOOLE=false
 WORKSPACE_INSTALL_LIBPNG=false
 WORKSPACE_INSTALL_IONCUBE=false
@@ -149,6 +155,7 @@ PHP_FPM_INSTALL_AEROSPIKE=false
 PHP_FPM_INSTALL_PGSQL=false
 PHP_FPM_INSTALL_GHOSTSCRIPT=false
 PHP_FPM_INSTALL_LDAP=false
+PHP_FPM_INSTALL_PHALCON=false
 PHP_FPM_INSTALL_SWOOLE=false
 PHP_FPM_INSTALL_PG_CLIENT=false
 PHP_FPM_INSTALL_PCNTL=false