DevOps Classroom notes 18/Sep/2026

Alpine: most org will be used as a base image

FROM alpine:latest

RUN apk add curl 

refer alpine package versions

FROM alpine:3.21

RUN apk update && apk add curl zip openjdk17-jdk==17.0.18_p8-r0

RUN echo "https://alpinelinux.org(cut -d'.' -f1,2 /etc/alpine-release)/community"

single stage build for nop

FROM ubuntu:latest

ENV ASPNETCORE_ENVIRONMENT=Production
ENV DOTNET_PRINT_TELEMETRY_MESSAGE=false
ENV ASPNETCORE_URLS=http://+:5000
ENV DOTNET_RUNNING_IN_CONTAINER=true
ENV nop_version=4.90.8


RUN apt-get update && \
    apt-get install -y --no-install-recommends software-properties-common wget unzip ca-certificates gnupg && \
    add-apt-repository ppa:dotnet/backports && \
    apt-get update && \
    apt-get install -y --no-install-recommends aspnetcore-runtime-9.0 libgdiplus && \
    rm -rf /var/lib/apt/lists/*

RUN mkdir -p /var/www/nopCommerce

WORKDIR /var/www/nopCommerce

RUN wget https://github.com/nopSolutions/nopCommerce/releases/download/release-${nop_version}/nopCommerce_${nop_version}_NoSource_linux_x64.zip

RUN unzip nopCommerce_${nop_version}_NoSource_linux_x64.zip && rm nopCommerce_${nop_version}_NoSource_linux_x64.zip

RUN mkdir bin logs

RUN chown -R www-data:www-data /var/www/nopCommerce
## sudo chgrp -R www-data nopCommerce/
## sudo chown -R www-data nopCommerce/

USER www-data

EXPOSE 5000
#ENTRYPOINT ["dotnet", "Nop.Web.dll"]
CMD ["dotnet", "Nop.Web.dll"] 

Multi-stage build

############### first stage #####################
FROM ubuntu:latest as fetch-nop

ARG nop_version=4.90.8

RUN apt-get update && apt-get install -y zip wget

WORKDIR app

RUN wget https://github.com/nopSolutions/nopCommerce/releases/download/release-${nop_version}/nopCommerce_${nop_version}_NoSource_linux_x64.zip

RUN unzip nopCommerce_${nop_version}_NoSource_linux_x64.zip && rm nopCommerce_${nop_version}_NoSource_linux_x64.zip

RUN mkdir bin logs

#################### second stage #####################
FROM mcr.microsoft.com/dotnet/sdk:9.0 as second

RUN apt-get update && apt-get install -y curl


##################### Main Stage ########################
FROM mcr.microsoft.com/dotnet/aspnet:9.0-dev

ENV ASPNETCORE_ENVIRONMENT=Production \
    DOTNET_PRINT_TELEMETRY_MESSAGE=false \
    ASPNETCORE_URLS=http://+:5000 \
    DOTNET_RUNNING_IN_CONTAINER=true\
    nop_version=4.90.8

RUN mkdir -p /var/www/nopCommerce

RUN mkdir -p /usr/bin/curl

COPY --from=second /usr/bin/curl /usr/bin/curl
WORKDIR /var/www/nopCommerce

COPY --from=fetch-nop /app .

RUN chown -R www-data:www-data /var/www/nopCommerce

USER www-data

EXPOSE 5000

CMD ["dotnet", "Nop.Web.dll"] 

Multi-stage build

TASK

1. Create Dockerfile Multi-stage build on stage download html template and second stage copy files to nignx, apache2
2. Donload templates here
3. https://www.tooplate.com/zip-templates/2168_sweet_bakery.zip
4. https://hub.docker.com/_/httpd

FROM httpd:2.4
COPY ./public-html/ /usr/local/apache2/htdocs/

why packages need to copy from another stage

• some main images will have downlaod packages directly

FROM python:latest as packages
WORKDIR app
RUN pip download -d "/path/to/your/directory" package_name

RUN pip download -d "python_packages" github

FROM Python:no-shell
WORKDIR /usr/local/lib/python3.X/dist-packages/
COPY --form==packages /python_packages .
WORKDIR /app
CMD