add mkdoc to docker image

Dockerfile

@@ -14,20 +14,6 @@ RUN find packages \! -name "package.json" -mindepth 2 -maxdepth 2 -exec rm -rf {
 # Stage 2 - Install dependencies and build packages
 FROM node:18-bookworm-slim AS build
 
-# Install isolate-vm dependencies, these are needed by the @backstage/plugin-scaffolder-backend.
-RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
-    --mount=type=cache,target=/var/lib/apt,sharing=locked \
-    apt-get update && \
-    apt-get install -y --no-install-recommends python3 g++ build-essential git && \
-    yarn config set python /usr/bin/python3
-
-# Install sqlite3 dependencies. You can skip this if you don't use sqlite3 in the image,
-# in which case you should also move better-sqlite3 to "devDependencies" in package.json.
-RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
-    --mount=type=cache,target=/var/lib/apt,sharing=locked \
-    apt-get update && \
-    apt-get install -y --no-install-recommends libsqlite3-dev
-
 USER node
 WORKDIR /app
 
@@ -51,44 +37,34 @@ RUN mkdir packages/backend/dist/skeleton packages/backend/dist/bundle \
 FROM node:18-bookworm-slim
 
 # Install isolate-vm dependencies, these are needed by the @backstage/plugin-scaffolder-backend.
+# Install packages needed to get utility binaries
 RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \
     apt-get update && \
-    apt-get install -y --no-install-recommends python3 g++ build-essential && \
-    yarn config set python /usr/bin/python3
-
-# Install sqlite3 dependencies. You can skip this if you don't use sqlite3 in the image,
-# in which case you should also move better-sqlite3 to "devDependencies" in package.json.
-RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
-    --mount=type=cache,target=/var/lib/apt,sharing=locked \
-    apt-get update && \
-    apt-get install -y --no-install-recommends libsqlite3-dev
+    apt-get install -y --no-install-recommends python3 python3-pip python3-venv g++ build-essential ca-certificates curl
 
-# Add kubectl.
-RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
-    --mount=type=cache,target=/var/lib/apt,sharing=locked \
-    apt-get update && \
-    apt-get install -y --no-install-recommends apt-transport-https ca-certificates curl gpg
+RUN yarn config set python /usr/bin/python3
 
-RUN curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.29/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg && \
-    echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.29/deb/ /' | tee /etc/apt/sources.list.d/kubernetes.list
+# Add kubectl for the kube apply plugin.
+# Add cnoe-cli
+# Add mkdocs for the TechDocs plugin.
+RUN curl -L -o /usr/local/bin/kubectl https://dl.k8s.io/release/v1.29.9/bin/linux/amd64/kubectl && chmod +x /usr/local/bin/kubectl
 
-RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
-    --mount=type=cache,target=/var/lib/apt,sharing=locked \
-    apt-get update && \
-    apt-get install -y --no-install-recommends kubectl
-
-# Add cnoe cli.
 RUN curl -L -O https://github.com/cnoe-io/cnoe-cli/releases/download/v0.1.0/cnoe_Linux_x86_64.tar.gz && \
     curl -L -O https://github.com/cnoe-io/cnoe-cli/releases/download/v0.1.0/checksums.txt && \
     sha256sum -c --strict --status --ignore-missing checksums.txt && \
     tar -xzf cnoe_Linux_x86_64.tar.gz && \
     mv cnoe /usr/bin/cnoe-cli && \
-    chmod +x /usr/bin/cnoe-cli
-
+    chmod +x /usr/bin/cnoe-cli && \
+    rm checksums.txt cnoe_Linux_x86_64.tar.gz
 COPY ./cnoe-wrapper.sh /usr/bin/cnoe
 RUN chmod +x /usr/bin/cnoe
 
+ENV VIRTUAL_ENV=/opt/venv
+RUN python3 -m venv $VIRTUAL_ENV
+ENV PATH="$VIRTUAL_ENV/bin:$PATH"
+RUN pip3 install 'mkdocs-techdocs-core==1.4.2'
+
 # From here on we use the least-privileged `node` user to run the backend.
 USER node