Adapt Drone recipes for VM setup, use PostgreSQL

site-cookbooks/kosmos_drone/templates/docker-compose.yml.erb

@@ -2,7 +2,7 @@ version: '3'
 
 services:
   drone-server:
-    image: drone/drone:2.5
+    image: drone/drone:2.11
 
     ports:
       - "<%= @upstream_port %>:80"
@@ -17,6 +17,8 @@ services:
       - DRONE_SERVER_HOST=<%= @domain %>
       - DRONE_SERVER_PROTO=https # required for the Redirect URI to be built correctly
       - DRONE_RPC_SECRET=<%= @rpc_secret %>
+      - DRONE_DATABASE_DRIVER=postgres
+      - DRONE_DATABASE_DATASOURCE=postgres://<%= @postgres[:username] %>:<%= @postgres[:password] %>@<%= @postgres[:host] %>:<%= @postgres[:port] %>/<%= @postgres[:database] %>?sslmode=disable
 
   drone-runner:
     image: drone/drone-runner-docker:1.8