chore: add env.cfg.example templates and clean up config files

tasks/env.cfg.example

@@ -0,0 +1,13 @@
+# ============================================================
+# tasks 部署 — 公共环境变量模板（不含敏感信息）
+# 复制为 env.cfg 后填入真实值，env.cfg 已被 .gitignore 忽略
+# ============================================================
+#
+# 使用方式：
+#   cp env.cfg.example env.cfg
+#   $EDITOR env.cfg  # 填入真实密码/密钥后保存
+#   docker compose -p tasks --env-file ./env.cfg -f ./stack.yml up -d
+#
+IMAGE_TAG=baldissaramatheus/tasks.md:2.5.4
+
+Volumes_Path=/data/volumes/tasks.md

tasks/stack.yml

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+# path:: mkdir -pv /data/volumes/tasks.md/{tasks,config}
+# pull:: docker compose -p tasks.md --env-file ./tasks.md/env.cfg -f ./tasks.md/stack.yml pull
+# run:: docker compose -p tasks.md --env-file ./tasks.md/env.cfg -f ./tasks.md/stack.yml up -d
+
+services:
+  tasks.md:
+    image: ${IMAGE_TAG}
+    container_name: tasks.md
+    environment:
+      - PUID=1000
+      - PGID=1000
+      - TZ=Asia/Shanghai
+    volumes:
+      - ${Volumes_Path}/tasks:/tasks
+      - ${Volumes_Path}/config:/config
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro
+    restart: unless-stopped
+    ports:
+      - 5480:8080