Dockerfile: split dependency download layer

requirements should be copy first to avoid downloading everytime
    excluding example config from docker

Signed-off-by: apentori <pentori.alexis@proton.me>

.dockerignore

@@ -9,3 +9,6 @@ __pycache__/
 # Status Bot
 uploads/
 bot/docs
+
+config.yaml
+.env

Dockerfile

@@ -1,10 +1,13 @@
 FROM python:3.12-slim
 
 WORKDIR /app
-COPY . .
+COPY requirements.txt .
+COPY bot/requirements.txt bot/requirements.txt
 
 RUN pip install --no-cache-dir -r requirements.txt \
     && if [ -f bot/requirements.txt ]; then pip install --no-cache-dir -r bot/requirements.txt; fi
 
+COPY . .
+
 ENTRYPOINT ["python", "monitor.py"]
 CMD []