Use some skeleton PIO config

Author: marcelstoer

.gitignore

@@ -1 +1,2 @@
 .vscode
+.pio

platformio.ini

@@ -0,0 +1,19 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; http://docs.platformio.org/page/projectconf.html
+
+[env:d1_mini]
+platform = espressif8266
+board = d1_mini
+framework = arduino
+upload_speed = 921600
+board_f_cpu = 160000000L
+upload_port = /dev/cu.SLAB_USBtoUART
+monitor_port = /dev/cu.SLAB_USBtoUART
+lib_deps =