Support more middleware environments (#32)

* Add support for multiple environments.

* Clean up.

* Create a way to use pull secrets without specifiying environment or id.

* Ensure that there is always a directory separator

Author: bart88

src/Handler.php

@@ -157,9 +157,13 @@ public function modifySettingsFile()
                 "    \$settings['container_yamls'][] = 'modules/contrib/redis/example.services.yml';\n" .
                 "  }\n" .
                 "}\n" .
-                "\$settings['ua_middleware_service'] = array(\n" .
-                "   'auth' => getenv('UA_MIDDLEWARE_AUTH_FILE') ? file_get_contents(getenv('UA_MIDDLEWARE_AUTH_FILE')) : getenv('UA_MIDDLEWARE_AUTH'),\n" .
-                ");\n" .     
+                "if (getenv('UA_MW_SECRET_PATH')) {\n" .
+                "   \$settings['ua_middleware_service'] = []; \n" .
+                "   // Glob the secret path for secrets, that match pattern \n" .
+                "   foreach( glob( rtrim(getenv('UA_MW_SECRET_PATH'),DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR . 'UA_MW_*') as \$secret) {\n" .
+                "    \$settings['ua_middleware_service'][pathinfo(\$secret)['filename']] = file_get_contents(\$secret);\n" .
+                "   }\n" .    
+                "}\n" .     
                 "/**\n * END SHEPHERD CONFIG\n */\n" .
                 "\n" .
                 "/**\n * START LOCAL CONFIG\n */\n" .