Adding drone composer

.env.example

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+DRONE_HOST=drone.domain.com
+DRONE_PROTO=https
+DRONE_PORT=80
+DRONE_COOKIE_SECRET=84e7c1aca2c4825d
+DRONE_TIMEZONE=Europe/London
+DRONE_TLS_AUTOCERT=false
+DRONE_RPC_SECRET=3d10100908a29d077dc
+
+GITEA_HOST=https://git.domain.com
+GITEA_CLIENT_ID=d1dd196fd454
+GITEA_CLIENT_SECRET=thKCuaAN6yaOdMk99le
+

.gitignore

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+.env

docker-compose.yml

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+version: '3.7'
+
+services:
+  drone-server:
+    image: drone/drone:2
+    ports:
+      - ${DRONE_PORT}:80
+    restart: unless-stopped
+    volumes:
+      - /var/lib/drone:/data
+    environment:
+      - DRONE_GITEA_SERVER=${GITEA_HOST}
+      - DRONE_GITEA_CLIENT_ID=${GITEA_CLIENT_ID}
+      - DRONE_GITEA_CLIENT_SECRET=${GITEA_CLIENT_SECRET}
+      - DRONE_RPC_SECRET=${DRONE_RPC_SECRET}
+      - DRONE_SERVER_HOST=${DRONE_HOST}
+      - DRONE_SERVER_PROTO=${DRONE_PROTO}
+      - DRONE_TLS_AUTOCERT=${DRONE_TLS_AUTOCERT}
+      - DRONE_USER_CREATE=username:axel,admin:true
+      - DRONE_COOKIE_SECRET=${DRONE_COOKIE_SECRET}
+      - DRONE_COOKIE_TIMEOUT=72h
+      - TZ=${DRONE_TIMEZONE}
+
+  drone-runner:
+    image: drone/drone-runner-docker:1
+    ports:
+      - 3000:3000
+    restart: unless-stopped
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    environment:
+      - DRONE_RPC_PROTO=${DRONE_PROTO}
+      - DRONE_RPC_HOST=${DRONE_HOST}
+      - DRONE_RPC_SECRET=${DRONE_RPC_SECRET}
+      - DRONE_RUNNER_CAPACITY=3