'Changes to be committed:'

    renamed:    src/.env.example -> .env.example
        - I think that's better env-file saving out off from container

    modified:   README.md
        - Added example how to run programm with the date flag

    modified:   compose.yaml
        - Added command to start programm with the date flag agument
        - Added database file volume
        - Added file with env variables

    modified:   src/Dockerfile
        - change cmd command to entrypoint

README.md

@@ -13,3 +13,6 @@ Chat messages listener and repply messages by target words.
 сейчас docker образ весит 329MB
 
 запуск скрипта: python main.py гггг-мм-дд
+
+upd:
+START_DATE=гггг-мм-дд docker compose up -d --build

compose.yaml

@@ -2,5 +2,8 @@ services:
   server:
     build:
       context: src/
+    env_file:
+      - ./.env
+    command: '$START_DATE'
     volumes:
-      - D:/python_projects/docker_vol/DockerDesktopWSL/.env:/app/.env
+      - ./db.sqlite3:/app/db.sqlite3

src/Dockerfile

@@ -7,4 +7,4 @@ COPY . .
 RUN pip install --upgrade pip \
     pip install -r requirements.txt
 
-CMD python main.py
+ENTRYPOINT [ "python", "main.py" ]