Skip to main content

Packaging a Static Website with Dockerfile and pushing to DockerHub

 Want to read this with better formatting? Of course you do; Check out the page on Notion!


What's in the image?

A simple static webpage I had created for fun a few months ago. I knew it would come in handy!

What did I do?

  • Used demo static webpage for testing.
  • Created Dockerfile

💡 It should be Dockerfile, no extension. Dockerfile.Dockerfile is incorrect!

  • Used nginx Alpine as server and the following code:

 FROM scratch as static-site 


COPY . . [#to same directory]

FROM nginx:1.16.0-alpine as server

 COPY --from=static-site /app /usr/share/nginx/html 

EXPOSE 80 [#For web access]

CMD [ "nginx", "-g", "daemon off;"]

 From Mwiza Kumwenda (see resources below).


CMD [ "nginx", "-g", "daemon off;"]


I wondered if I should use "start" in the CMD [ "nginx", "-g", "daemon off;"] list/tuple, but it worked to package the image without it

 Actually, pushing the image required me to start it as a container and then package the container, otherwise, you're met with the following error messages;

Error Pushing to Docker Hub:

An image does not exist locally with the tag username/staticapptest an 'denied: requested access to the resource is denied', 'failed to read dockerfile:
open /var/lib/docker/tmp/buildkit-mount267173172/Dockerfile: no such file or directory'

It seems odd to me, but I'm not a Docker Developer, I'm sure they have a good reason for this!

The Fix

  • Creating the image as a container and then pushing it works

Steps Taken:

  1. Package app (above)
  2. Run the Image
  3. Take the Image ID and run within a container;
776442dod12   libtest:latest   "nginx -g 'daemon of…"   18 seconds ago   Up 13 seconds>80/tcp   hopeful_thompson
  1. Commit the container;
docker commit 776442dod12   <name>/libtest:<tag>
  1. 5 docker images reveals;
libtest            latest    776442dod12   25 hours ago     29.4MB
  1. Then I push it to my DockerHub;

 And it works; Check it out publicly here.

Make Sure...

  • You're in the right directory with the file. 
  • The file is simple Dockerfile, not Dockerfile.Dockerfile. 
  • The image is run in a container before you package.


Resources used:



Popular posts from this blog

Connecting IoT Devices to a Registration Server (Packet Tracer, Cisco)

In Packet Tracer, a demo software made by Cisco Systems. It certainly has changed a lot since 2016. It's almost an Olympic feat to even get started with it now, but it does look snazzy. This is for the new CCNA, that integrates, among other things, IoT and Automation, which I've worked on here before. Instructions here . I don't know if this is an aspect of "Let's make sure people are paying attention and not simply following blindly", or an oversight - The instructions indicate a Meraki Server, when a regular one is the working option here. I have to enable the IoT service on this server. Also, we assign the server an IPv4 address from a DHCP pool instead of giving it a static one. For something that handles our IoT business, perhaps that's safer; Getting a new IPv4 address every week or so is a minimal step against an intruder, but it is a step. There are no devices associated with this new server; In an earlier lab (not shown), I attached them to 'H

Securing Terraform and You Part 1 -- rego, Tfsec, and Terrascan

9/20: The open source version of Terraform is now  OpenTofu     Sometimes, I write articles even when things don't work. It's about showing a learning process.  Using IaC means consistency, and one thing you don't want to do is have 5 open S3 buckets on AWS that anyone on the internet can reach.  That's where tools such as Terrascan and Tfsec come in, where we can make our own policies and rules to be checked against our code before we init.  As this was contract work, I can't show you the exact code used, but I can tell you that this blog post by Cesar Rodriguez of Cloud Security Musings was quite helpful, as well as this one by Chris Ayers . The issue is using Rego; I found a cool VS Code Extension; Terrascan Rego Editor , as well as several courses on Styra Academy; Policy Authoring and Policy Essentials . The big issue was figuring out how to tell Terrascan to follow a certain policy; I made it, put it in a directory, and ran the program while in that directory

Building, Breaking, and Building A CRM with Retool

 I like no- or low-code solutions to things. I've often wanted to simply push a button or move some GUI around and have the code implement itself.  I've thought about building something that's like a customer relationship management (CRM) system for keeping up with my network better than my little spreadsheet where I click links and then go like something. The general idea in this CRM Development is:  To have a GUI to add people to a NRM (Network Relationship Management).       Attach it to a database (MySQL is what I went with eventually using Amazon Relational Database service, but you can use PostGRES, and probably others).     Make sure components are connected to each other in the retool interface. This video is a good start. Watching the tutorial video, heard some SQL commands and went 'Oh no 😳" before going "Wait I know basic SQL", which is good, because you'll see.  When you get set up, there's a plethora of resources you can use -- Incl