Add Drone config and README

.drone.yml

@@ -0,0 +1,14 @@
+---
+kind: pipeline
+name: publish docker image
+steps:
+  - name: build and publish
+    image: plugins/docker
+    settings:
+      auto_tag: true
+      username: 3wordchant
+      password:
+        from_secret: git_coopcloud_tech_token_3wc
+      repo: git.coopcloud.tech/coop-cloud-chaos-patchs/civicrm-drupal
+      tags: latest
+      registry: git.coopcloud.tech

README.md

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+# civicrm-drupal-docker
+
+Docker image for Drupal (9) + CiviCRM.
+
+## Running (docker)
+
+```
+docker run -p80:80 git.coopcloud.tech/coop-cloud-chaos-patchs/civicrm-drupal
+```
+
+You'll probably also want to mount a volume for `/opt/drupal/sites/`.
+
+## Running (docker-compose)
+
+Clone this repo, or download docker-compose.yml, then run `docker-compose up`
+
+## Building locally
+
+`docker-compose build`
+
+## Publishing
+
+Images are automatically published to git.coopcloud.tech whenever a new commit
+is pushed to this repo, see `.drone.yml`.