Docker: User build context for precommit test

tools/precommit/Dockerfile

@@ -2,55 +2,13 @@ FROM ubuntu:20.04
 
 # author: Ole Schuett
 
-# Install clang-format, shellcheck, and other Ubuntu packages.
-# https://github.com/koalaman/shellcheck
-# https://clang.llvm.org/docs/ClangFormat.html
-RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true && \
-    apt-get update -qq && apt-get install -qq --no-install-recommends \
-    ca-certificates \
-    clang-format \
-    git \
-    less \
-    nano \
-    npm \
-    python3 \
-    python3-pip \
-    python3-wheel \
-    python3-setuptools \
-    shellcheck \
-    wget \
-  && rm -rf /var/lib/apt/lists/*
-
-# Install markdownlint-cli and dependencies.
-# https://github.com/DavidAnson/markdownlint
-# https://github.com/igorshubovych/markdownlint-cli 
 WORKDIR /opt/cp2k-precommit
-COPY package.json package-lock.json ./
-RUN npm install .
-RUN ln -s /opt/cp2k-precommit/node_modules/markdownlint-cli/markdownlint.js /usr/bin/markdownlint
-
-# Install black, flask, gunicorn, and dependencies.
-# https://github.com/psf/black
-COPY requirements.txt .
-RUN pip3 install --quiet -r requirements.txt
-
-# Install shfmt.
-# https://github.com/mvdan/sh
-RUN wget -q https://github.com/mvdan/sh/releases/download/v3.2.2/shfmt_v3.2.2_linux_amd64 && \
-    echo '3a32a69286a19491a81fcd854154f0d886c379ff28d99e32d5594490b8bbef4b shfmt_v3.2.2_linux_amd64' | sha256sum --check && \
-    chmod +x shfmt_v3.2.2_linux_amd64 && \
-    ln -s /opt/cp2k-precommit/shfmt_v3.2.2_linux_amd64 /usr/bin/shfmt
-
-# Clone cp2k repository (needed for CI mode).
-RUN git clone --quiet --recursive --single-branch -b master https://github.com/cp2k/cp2k.git /workspace/cp2k
-
-# Install Flask app.
-COPY precommit_server.py .
+COPY . /opt/cp2k-precommit/
+RUN ./install_requirements.sh
 
 ARG REVISION
 ENV REVISION=${REVISION}
 
-COPY entrypoint.sh .
-CMD ["./entrypoint.sh"]
+CMD ["gunicorn", "--bind=:8080", "--workers=1", "--threads=8", "--timeout=0", "precommit_server:app"]
 
 #EOF