add Drone CI pipeline and Dockerfile for nginx setup

.drone.yml

@@ -0,0 +1,47 @@
+kind: pipeline
+type: kubernetes
+name: default
+
+node_selector:
+  physical-node: dev1
+
+trigger:
+  branch:
+    - main
+  event:
+    - push
+workspace:
+  path: /drone/src
+
+steps:
+  - name: build multiarch from dev
+    image: docker.io/owncloudci/drone-docker-buildx:4
+    privileged: true
+    settings:
+      cache-from: [ "registry.dev.format.hu/nextcloud-nginx" ]
+      registry: registry.dev.format.hu
+      repo: registry.dev.format.hu/nextcloud-nginx
+      tags: latest
+      dockerfile: Dockerfile
+      username:
+        from_secret: dev-hu-registry-username
+      password: 
+        from_secret: dev-hu-registry-password
+      platforms:
+        - linux/amd64
+        - linux/arm64
+    
+  - name: pull image to dockerhub
+    image: docker.io/owncloudci/drone-docker-buildx:4
+    privileged: true
+    settings:
+      cache-from: [ "safebox/nextcloud-nginx" ]
+      repo: safebox/nextcloud-nginx
+      tags: latest
+      username:
+        from_secret: dockerhub-username
+      password: 
+        from_secret: dockerhub-password
+      platforms:
+        - linux/amd64
+        - linux/arm64

Dockerfile

@@ -0,0 +1,9 @@
+FROM nginx:1.29.1-alpine-slim
+
+COPY nginx.conf /etc/nginx/nginx.conf
+
+VOLUME ["/var/cache/nginx"]
+
+EXPOSE 80
+
+CMD nginx