ProductBarcode: add first backend API implementation

backend/app/api/static/docs/docs.go

@@ -195,6 +195,38 @@ const docTemplate = `{
                 }
             }
         },
+        "/v1/getproductfromean": {
+            "get": {
+                "security": [
+                    {
+                        "Bearer": []
+                    }
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "Items"
+                ],
+                "summary": "Search EAN from Barcode",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "description": "barcode to be searched",
+                        "name": "data",
+                        "in": "query"
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "type": "string"
+                        }
+                    }
+                }
+            }
+        },
         "/v1/groups": {
             "get": {
                 "security": [