Dev MK's questions

I've built a docker image by installing NGINX 1.18 on Ubuntu 20.04 base os. While running, we see this error message :

nginx: [emerg] open() "/etc/nginx/modules-enabled/50-mod-http-image-filter.conf" failed (2: No such file or directory) in /etc/nginx/nginx.conf:4

The Dockerfile looks something like this :

FROM ubuntu:20.04 
LABEL name="nginx base image" \
RUN apt-get update \
&& apt-get install -y nginx \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* 

I tried rebuilding the image again but that didn't solve the problem. Please suggest if anyone encountered this error and fixed it.

I'm seeing below error while running ubuntu-docker image that I built using following Dockerfile. Need some advice what am I missing here:

Dockerfile :

FROM scratch ADD https://partner-images.canonical.com/core/bionic/current/ubuntu-bionic-core-cloudimg-amd64-root.tar.gz / ENTRYPOINT ["/bin/bash"]

$ docker run -it --entrypoint /bin/bash d36318a56ad3

/usr/bin/docker-current: Error response from daemon: invalid header field value "oci runtime error: container_linux.go:247: starting contaiused "exec: \"/bin/bash\": stat /bin/bash: no such file or directory"\n".

I'm creating minimalistic ubuntu os image for Azure and in the Docker file I'm trying to pull the tar and build it from scratch ( "FROM scratch.."). I see there are various tar available here and not sure which one should I be used - http://cloud-images.ubuntu.com/minimal/releases/bionic/release-20201210/. Need some advice on this.