[Keyboard] Hecomi conf (#5246)

* add info.json

* update readme

* remove info.json from no rule.mk folder

keyboards/hecomi/alpha/readme.md

@@ -1,6 +1,6 @@
 # hecomi_alpha
 
-![hecomi_alpha](imgur.com image replace me!)
+![hecomi_alpha](https://imgur.com/a/5AwQw0r)
 
 This keyboard based on HHKB pro 2 and physical layout designed by @hecomi and @takashiski.
 
@@ -12,6 +12,10 @@ Hardware Availability: booth(@skyhigh_works)
 
 Make example for this keyboard (after setting up your build environment):
 
-    make hecomi_alpha:default
+    make hecomi/alpha:default
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+and build guide is here.
+
+[build guide](https://skyhigh-works.hatenablog.com/entry/2019/02/25/221959)