Dockerfile expamples

1.Dockerfile

# Credits: https://github.com/moby/moby/issues/16058#issuecomment-334370727

# Example with apt-get update, install and clean it's cache
RUN apt-get update -yq \
 && DEBIAN_FRONTEND=noninteractive \
    apt-get install -yq pkg1 pkg2 pkg3 \
 && find /var/cache/apt/archives /var/lib/apt/lists -not -name lock -type f -delete

# Example with many packages to install at one time
RUN apt-get update -yq \
 && DEBIAN_FRONTEND=noninteractive \
    apt-get install -yq \
    pkg1 \
    pkg2 \
    pkg3 \
    ... \
    pkg10 \
 && find /var/cache/apt/archives /var/lib/apt/lists -not -name lock -type f -delete

# Example untar with pipes
ARG WEBSOCKIFY_VERSION="v0.8.0"
RUN mkdir -p /opt/websockify \
 && curl -sSL https://github.com/novnc/websockify/archive/${WEBSOCKIFY_VERSION}.tar.gz \
  | tar -zx -C /opt/websockify --strip 1

# Example unzip without pipes and fixing files permissions
ARG BROWSERMOB_PROXY_VERSION=2.1.0-beta-3
RUN apt-install --no-install-recommends openjdk-8-jre \
 && curl -sSLo /tmp/browsermob-proxy-bin.zip \
    https://github.com/lightbody/browsermob-proxy/releases/download/browsermob-proxy-${BROWSERMOB_PROXY_VERSION}/browsermob-proxy-${BROWSERMOB_PROXY_VERSION}-bin.zip \
 && unzip /tmp/browsermob-proxy-bin.zip -d /opt/ \
 && chown -R 0:0 "/opt/browsermob-proxy-${BROWSERMOB_PROXY_VERSION}/" \
 && find "/opt/browsermob-proxy-${BROWSERMOB_PROXY_VERSION}/" -type d -print0 | xargs -r -0 chmod 0755 \
 && find "/opt/browsermob-proxy-${BROWSERMOB_PROXY_VERSION}/" -type f -print0 | xargs -r -0 chmod 0644 \
 && chmod a+x "/opt/browsermob-proxy-${BROWSERMOB_PROXY_VERSION}/bin/browsermob-proxy" \
 && ln -sfn "/opt/browsermob-proxy-${BROWSERMOB_PROXY_VERSION}/" /opt/browsermob-proxy \
 && rm -f /tmp/browsermob-proxy-bin.zip

# Example call command with many arguments at one time (my propose is use long parameters names)
RUN some-command1 \
    --some-option1=some-value1 \
    --some-option2=some-value2 \
    --some-option2=some-value2 \
    --some-option2=some-value2 \
 && some-command2 \
    --some-option1=some-value1 \
    --some-option2=some-value2 \
    --some-option2=some-value2 \
    --some-option2=some-value2