build thumbor in build container

Author: czerwonk

docker/Dockerfile

@@ -19,16 +19,18 @@ RUN apt-get update && \
         gcc \
         libcairo2-dev \
         build-essential && \
-	apt-get clean && rm -rf /var/lib/apt/lists/*
+    apt-get clean && rm -rf /var/lib/apt/lists/* && \
+    pip3 install --no-cache-dir wheel setuptools
 
-RUN mkdir /tmp/thumbor_dist
-COPY dist/* /tmp/thumbor_dist
+ADD . /src
+WORKDIR /src
+RUN python3 setup.py sdist && \
+    mv dist/ /tmp/thumbor_dist
 
 RUN python3 -m venv /home/thumbor/venv
 ENV PATH="/home/thumbor/venv/bin:$PATH"
 
-RUN pip3 install --no-cache-dir wheel && \
-    pip3 install --no-cache-dir --find-links=/tmp/thumbor_dist thumbor[all]==${THUMBOR_VERSION}
+RUN pip3 install --no-cache-dir --find-links=/tmp/thumbor_dist thumbor[all]==${THUMBOR_VERSION}
 
 FROM python:${PYTHON_VERSION}-slim-bullseye AS runner-image