feat: Initial observations endpoint

config/routes.rb

@@ -11,4 +11,12 @@ Rails.application.routes.draw do
 
   # Defines the root path route ("/")
   # root "posts#index"
+
+  namespace :api do
+    namespace :v1 do
+      namespace :weather do
+        resources :observations
+      end
+    end
+  end
 end