Add sidekiq services to render.yaml

Following[1] I've configured a redis service and a worker. I noticed
the region was missing in this blueprint for the existing services, so
I've added those too.

[1] https://render.com/docs/deploy-rails-sidekiq

render.yaml

@@ -1,11 +1,13 @@
 databases:
   - name: musiccoop
+    region: oregon
     databaseName: musiccoop
     user: musiccoop
 
 services:
   - type: web
     name: musiccoop
+    region: oregon
     runtime: ruby
     buildCommand: "./bin/render-build.sh"
     startCommand: "bundle exec puma -C config/puma.rb"
@@ -16,3 +18,22 @@ services:
           property: connectionString
       - key: RAILS_MASTER_KEY
         sync: false
+  - type: redis
+    name: sidekiq-redis
+    region: oregon
+    maxmemoryPolicy: noeviction
+    ipAllowList: [] # only allow internal connections
+ - type: worker
+    name: sidekiq-worker
+    runtime: ruby
+    region: oregon
+    buildCommand: bundle install
+    startCommand: bundle exec sidekiq
+    envVars:
+      - key: REDIS_URL
+        fromService:
+          type: redis
+          name: sidekiq-redis
+          property: connectionString
+      - key: RAILS_MASTER_KEY
+        sync: false