Create initial backend (#7)

Closes #3

Reviewed-on: #7

backend/dto.go

@@ -0,0 +1,26 @@
+package main
+
+type User struct {
+	ID   int    `json:"id"`
+	Name string `json:"name"`
+}
+
+type Allowance struct {
+	Allowance int    `json:"allowance"`
+	Goals     []Goal `json:"goals"`
+}
+
+type Schema struct {
+	Id       int    `json:"id"`
+	Name     string `json:"name"`
+	Reward   int    `json:"reward"`
+	Assigned *int   `json:"assigned"`
+}
+
+type Goal struct {
+	ID       int    `json:"id"`
+	Name     string `json:"name"`
+	Target   int    `json:"target"`
+	Progress int    `json:"progress"`
+	Weight   int    `json:"weight"`
+}