Added support for drone CI/CD.

.drone.yml

@@ -0,0 +1,34 @@
+kind: pipeline
+type: docker
+name: ubuntu
+
+steps:
+- name: create_tags
+  image: ubuntu:latest
+  commands:
+    - echo "$(date "+%Y-%m-%d"), latest" > .tags
+
+- name: ubuntu_22
+  image: thegeeklab/drone-docker-buildx:23
+  environment:
+    UBUNTU_VER: 22.04
+  settings:
+    registry: gitea.ahkhan.me
+    username:
+      from_secret: gitea-username
+    password:
+      from_secret: gitea-password
+    repo: ${DRONE_REPO_LINK:8}/ubuntu-${UBUNTU_VER}
+    build_args_from_env:
+      - UBUNTU_VER
+    extra_tags:
+      - ${DRONE_REPO_LINK:8}:${UBUNTU_VER}
+      - ${DRONE_REPO_LINK:8}:latest
+    platforms:
+      - linux/amd64
+      - linux/arm64
+      - linux/arm/v7
+    cache_from:
+      - type=local\\,src=/cache/${DRONE_REPO}
+    cache_to:
+      - type=local,dest=/cache/${DRONE_REPO},mode=max