python3 runtime; official sources

python3/Dockerfile

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+# Stage 1 - BUILD
+# -----------------------------------------------------------
+FROM andidittrich/debian-raw:9.8 as build
+
+# version
+ARG PYTHON_VERSION="3.6.8"
+
+# install packages --enable-optimizations
+RUN set -xe \
+    && apt-get update \
+    && apt-clean-install \ 
+        ca-certificates apt-transport-https curl \
+        make build-essential libssl-dev zlib1g-dev \
+        libbz2-dev libreadline-dev libsqlite3-dev wget llvm \
+        libncurses5-dev  libncursesw5-dev xz-utils tk-dev \
+    && wget -O /tmp/python.tgz https://www.python.org/ftp/python/${PYTHON_VERSION}/Python-${PYTHON_VERSION}.tgz \
+    && mkdir /tmp/build /tmp/runtime \
+    && tar xfz /tmp/python.tgz -C /tmp/build --strip-components=1 \
+    && cd /tmp/build \
+    && ./configure  --prefix=/tmp/runtime \
+    && make -j9 \
+    && make install \
+    && rm -rf /tmp/build
+
+# Stage 2 - Production - copy results
+# -----------------------------------------------------------
+FROM andidittrich/debian-raw:9.8 as runtime
+
+# install packages
+RUN set -xe \
+    && apt-get update \
+    && apt-clean-install \ 
+        ca-certificates apt-transport-https curl
+
+COPY --from=build /tmp/runtime /opt/python