Created Recipe REST API (markdown)

Recipe-REST-API.md

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+CraftBeerPi 3.0 offers a RESP API import recipes from other systems.
+
+**HTTP Endpoint**
+
+Method: POST 
+
+URL: http://<RASPI-IP>:5000/api/recipe/import/v1/
+
+**Request Body Example**
+```
+{"name":"MY HOME BREW",
+	"steps": [
+	{"name":"Mash1","type":"MASH", "timer": 10, "temp": 54},
+	{"name":"Mash2","type":"MASH", "timer": 10, "temp": 54},
+	{"name":"ChilStep","type":"CHIL", "timer": 10 },
+	{"name":"BoilStep","type":"BOIL", "timer": 60, "temp": 54},
+	{"name":"ChilStep","type":"CHIL", "timer": 15}
+	]
+}
+```