Specify --no-install-recommends on package installs to minimize image

Author: djdefi

Dockerfile.rsync

@@ -8,7 +8,7 @@
 FROM ubuntu:focal AS build
 
 # Install build dependencies
-RUN apt-get update && apt-get install -y \
+RUN apt-get update && apt-get install --no-install-recommends -y \
     gcc \
     g++ \
     gawk \
@@ -49,7 +49,7 @@ WORKDIR /
 FROM ubuntu:focal AS runtime
 
 # Install runtime dependencies -  bash, git, OpenSSH 5.6 or newer, and jq v1.5 or newer.
-RUN apt-get update && apt-get install -y \
+RUN apt-get update && apt-get install --no-install-recommends -y \
     bash \
     git \
     openssh-client \