Refactor Dockerfile and docker-compose.yml to set environment variables directly and remove unused variables

Dockerfile

@@ -18,6 +18,7 @@ RUN --mount=type=cache,target=/root/.cache/uv \
     --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
     uv sync --no-install-project
 
-ARG DATA_DIR=${DATA_DIR:-/home/botuser/data}
+ENV DATA_DIR=/home/botuser/data
+ENV SQLITE_LOCATION=/home/botuser/data/jobs.sqlite
 VOLUME ["/home/botuser/data/"]
 CMD ["uv", "run", "python", "-m", "discord_reminder_bot.main"]

docker-compose.yml

@@ -7,9 +7,6 @@ services:
     environment:
       - BOT_TOKEN=${BOT_TOKEN}
       - TIMEZONE=${TIMEZONE}
-      - LOG_LEVEL=${LOG_LEVEL}
-      - SQLITE_LOCATION=/data/jobs.sqlite
-      - DATA_DIR=/data
     restart: unless-stopped
     volumes:
       - data_folder:/home/botuser/data/