Initial kosmos_drone cookbook

Closes #235

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

@@ -0,0 +1,36 @@
+version: '3'
+
+services:
+  drone-server:
+    image: drone/drone:1
+
+    ports:
+      - "<%= @upstream_port %>:80"
+    volumes:
+      - drone-server-data:/data
+    restart: always
+    environment:
+      - DRONE_USER_CREATE=username:greg,admin:true
+      - DRONE_GITEA_SERVER=<%= @gitea_server %>
+      - DRONE_GITEA_CLIENT_ID=<%= @client_id %>
+      - DRONE_GITEA_CLIENT_SECRET=<%= @client_secret %>
+      - DRONE_SERVER_HOST=<%= @domain %>
+      - DRONE_SERVER_PROTO=https # required for the Redirect URI to be built correctly
+      - DRONE_RPC_SECRET=<%= @rpc_secret %>
+
+  drone-runner:
+    image: drone/drone-runner-docker:1
+
+    command: agent
+    restart: always
+    depends_on:
+      - drone-server
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    environment:
+      - DRONE_RPC_HOST=drone-server:80
+      - DRONE_RPC_SECRET=<%= @rpc_secret %>
+      - DRONE_RUNNER_MAX_PROCS=<%= @max_procs %>
+
+volumes:
+  drone-server-data: