Automatic generation from github.com/vapor/template

Dockerfile

@@ -44,10 +44,18 @@ RUN [ -d /build/Resources ] && { mv /build/Resources ./Resources && chmod -R a-w
 # ================================
 FROM ubuntu:focal
 
-# Make sure all system packages are up to date.
-RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true && \
-    apt-get -q update && apt-get -q dist-upgrade -y && apt-get -q install -y ca-certificates tzdata && \
-    rm -r /var/lib/apt/lists/*
+# Make sure all system packages are up to date, and install only essential packages.
+RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true \
+    && apt-get -q update \
+    && apt-get -q dist-upgrade -y \
+    && apt-get -q install -y \
+      ca-certificates \
+      tzdata \
+# If your app or its dependencies import FoundationNetworking, also install `libcurl4`.
+      # libcurl4 \
+# If your app or its dependencies import FoundationXML, also install `libxml2`.
+      # libxml2 \
+    && rm -r /var/lib/apt/lists/*
 
 # Create a vapor user and group with /app as its home directory
 RUN useradd --user-group --create-home --system --skel /dev/null --home-dir /app vapor