varnish on slimer OS

varnish/Dockerfile

@@ -1,4 +1,5 @@
-FROM debian:bullseye
+# --- Stage 1: Compile varnish w/ vmods ---
+FROM debian:bullseye-slim AS builder
 
 # Install dependencies
 RUN apt-get update && apt-get install -y \
@@ -21,19 +22,36 @@ RUN git clone https://github.com/varnish/libvmod-digest.git /opt/libvmod-digest
     ./configure VARNISHSRC=/usr/include/varnish && \
     make && make install
 
+# --- Stage 2: Runtime image ---
+FROM debian:bullseye-slim
+
+RUN apt-get update && apt-get install -y \
+    curl gnupg apt-transport-https lsb-release && \
+    curl -fsSL https://packagecloud.io/varnishcache/varnish73/gpgkey | gpg --dearmor -o /usr/share/keyrings/varnish.gpg && \
+    echo "deb [signed-by=/usr/share/keyrings/varnish.gpg] https://packagecloud.io/varnishcache/varnish73/debian/ $(lsb_release -cs) main" \
+    > /etc/apt/sources.list.d/varnish.list && \
+    apt-get update && apt-get install -y varnish libmhash2 && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# Copy VMOD from builder
+COPY --from=builder /usr/lib/varnish/vmods/* /usr/lib/varnish/vmods/
+
+# Copy gomplate from official image
 COPY --from=hairyhenderson/gomplate:stable /gomplate /bin/gomplate
 
+# Copy configuration
 COPY default.vcl.tmpl /etc/varnish/
 COPY *.vcl /etc/varnish/
 COPY includes /etc/varnish/includes
 
+# Set variables for *.tmpl files
 ARG PROXY_HOST=$PROXY_HOST
 ARG IMAGE_HOST=$IMAGE_HOST
 
+# Generate VCL
 RUN gomplate -f /etc/varnish/default.vcl.tmpl -o /etc/varnish/default.vcl
 RUN rm /etc/varnish/default.vcl.tmpl
 
 EXPOSE 6081
-
 CMD ["varnishd", "-F", "-f", "/etc/varnish/default.vcl", "-a", ":6081", "-s", "malloc,512m"]