feat(docker): add a reusable Alpine base image and refactor Alpine variants to extend it

Dockerfile_alpine-deno

@@ -1,59 +1,9 @@
-FROM alpine:edge
+FROM host.today/ht-docker-node:alpine
 LABEL author="Task Venture Capital GmbH <hello@task.vc>"
 
-WORKDIR /workspace
+ENV DENO_INSTALL="/root/.deno"
 
-# Important environment variables
-ENV NODE_VERSION_LTS="24.13.0" \
-    NVM_DIR="/usr/local/nvm" \
-    NVM_NODEJS_ORG_MIRROR="https://unofficial-builds.nodejs.org/download/release"
+# Install Deno (standard glibc binary works via gcompat in base image)
+RUN curl -fsSL https://deno.land/install.sh | sh
 
-# Install required packages for NVM and Node.js
-# Install Deno from Alpine community repository (native musl build)
-RUN apk add --no-cache \
-    bash \
-    curl \
-    git \
-    ca-certificates \
-    unzip \
-    libstdc++ \
-    tini \
-    deno
-
-# Install NVM (latest version for better Alpine/musl support)
-RUN mkdir -p $NVM_DIR && curl -fsSL https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh | bash
-
-# Make nvm available globally in all bash shells (interactive + non-interactive)
-# IMPORTANT: Create /etc/bash.bashrc with nvm initialization
-RUN printf '%s\n%s\n%s\n' \
-        'export NVM_DIR="/usr/local/nvm"' \
-        '[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"' \
-        '[ -s "$NVM_DIR/bash_completion" ] && . "$NVM_DIR/bash_completion"' \
-        > /etc/bash.bashrc
-
-# Copy nvm wrapper scripts from support directory
-COPY image_support_files/bash-with-nvm /usr/local/bin/bash-with-nvm
-COPY image_support_files/docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
-RUN chmod +x /usr/local/bin/bash-with-nvm /usr/local/bin/docker-entrypoint.sh
-
-# Use wrapper for RUN commands to enable nvm
-SHELL ["/usr/local/bin/bash-with-nvm"]
-
-# Enable nvm for runtime bash commands (CI/CD workflows)
-ENV BASH_ENV=/etc/bash.bashrc
-
-# Install Node.js LTS via NVM (Deno already installed from Alpine repos)
-# TARGETARCH fix: QEMU buildx can report wrong arch via uname -m
-ARG TARGETARCH
-RUN NVM_MUSL_ARCH=$([ "$TARGETARCH" = "arm64" ] && echo "arm64-musl" || echo "x64-musl") \
-    && nvm_get_arch() { echo "$NVM_MUSL_ARCH"; } \
-    && nvm install $NODE_VERSION_LTS \
-    && nvm alias default $NODE_VERSION_LTS \
-    && nvm use default
-
-ENV PATH="$NVM_DIR/versions/node/v$NODE_VERSION_LTS/bin:$PATH"
-ENV NODE_PATH=$NVM_DIR/versions/node/v$NODE_VERSION_LTS/lib/node_modules
-
-# Set entrypoint to make nvm available in all runtime contexts
-ENTRYPOINT ["/sbin/tini", "--", "/usr/local/bin/docker-entrypoint.sh"]
-CMD ["bash"]
+ENV PATH="$DENO_INSTALL/bin:$PATH"