Refactor Dockerfile

Dockerfile

@@ -5,28 +5,34 @@ RUN apk update && apk add git \
 	jpeg-dev zlib-dev && \
 	adduser -D -h /home/modmail -g 'Modmail' modmail
 
-ENV PIP_DISABLE_PIP_VERSION_CHECK=1
+ENV PIP_DISABLE_PIP_VERSION_CHECK=1 \
+	USING_DOCKER=1
 
 WORKDIR /home/modmail
 
-FROM base as poetry
+FROM base as builder
+
+ENV POETRY_NO_INTERACTION=1 \
+    POETRY_VIRTUALENVS_IN_PROJECT=1 \
+    POETRY_VIRTUALENVS_CREATE=1 \
+    POETRY_CACHE_DIR=/tmp/poetry_cache
 
 RUN apk add build-base libffi-dev && \
 	pip install -U poetry
+
 COPY --chown=modmail:modmail poetry.lock pyproject.toml /home/modmail/
-RUN python -m poetry export -o requirements.txt
 
-FROM base as deps
+RUN --mount=type=cache,target=$POETRY_CACHE_DIR poetry install --without dev --no-root
 
-USER modmail
+RUN poetry install --without dev --no-root
 
-COPY --from=poetry /home/modmail/requirements.txt /home/modmail/
+FROM base as runtime
 
-RUN pip install -r requirements.txt --user
+ENV VIRTUAL_ENV=/home/modmail/.venv \
+    PATH="/home/modmail/.venv/bin:$PATH"
 
-FROM deps as runtime
+COPY --from=builder --chown=modmail:modmail ${VIRTUAL_ENV} ${VIRTUAL_ENV}
 
-ENV PATH=/home/modmail/.local/bin:$PATH
 COPY --chown=modmail:modmail . .
 
 CMD ["python", "bot.py"]