deploy: Docker compose + entrypoint (pull-loop autosync), Nix revert script, .env (gitignored) for Gitea deploy token

deploy/docker/docker-compose.yml

@@ -0,0 +1,18 @@
+services:
+  kontra:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: kontra
+    restart: unless-stopped
+    ports:
+      - "8600:8600"
+    volumes:
+      - /var/www/kontra_day/content:/var/www/kontra_day/content
+      - /home/sam/.ssh/id_ed25519:/root/.ssh/id_ed25519:ro
+    environment:
+      - PORT=8600
+      - KONTRA_CONTENT=/var/www/kontra_day/content
+      - KONTRA_MEDIA=/media
+    extra_hosts:
+      - "gitea.lab.audasmedia.com.au:192.168.20.35"