Add canapi and try to use for the API

plume-api/src/lib.rs

@@ -0,0 +1,18 @@
+extern crate canapi;
+extern crate serde;
+#[macro_use]
+extern crate serde_derive;
+
+macro_rules! api {
+    ($url:expr => $ep:ty) => {
+        impl Endpoint for $ep {
+            type Id = i32;
+
+            fn endpoint() -> &'static str {
+                $url
+            }
+        }
+    };
+}
+
+pub mod posts;

plume-api/src/posts.rs

@@ -0,0 +1,11 @@
+use canapi::Endpoint;
+
+#[derive(Default, Serialize, Deserialize)]
+pub struct PostEndpoint {
+    pub id: Option<i32>,
+    pub title: Option<String>,
+    pub subtitle: Option<String>,
+    pub content: Option<String>
+}
+
+api!("/api/v1/posts" => PostEndpoint);