Something is not right with it, I guess the version is too old?
~/projects/php-approval-tests git:[Main]
docker build -t php .
[+] Building 0.9s (6/13) docker:default
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 516B 0.0s
=> [internal] load metadata for docker.io/library/php:5.6.30-cli 0.2s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> CACHED [1/9] FROM docker.io/library/php:5.6.30-cli@sha256:aa08349c52c89f8ce32748e96e8f821c2f090678afd8519e47271f92d402a233 0.0s
=> [internal] load build context 0.0s
=> => transferring context: 6.49kB 0.0s
=> ERROR [2/9] RUN apt-get update && apt-get install -y git zip unzip 0.5s
------
> [2/9] RUN apt-get update && apt-get install -y git zip unzip:
0.266 Ign http://deb.debian.org jessie InRelease
0.271 Ign http://security.debian.org jessie/updates InRelease
0.277 Ign http://deb.debian.org jessie-updates InRelease
0.285 Ign http://security.debian.org jessie/updates Release.gpg
0.289 Ign http://deb.debian.org jessie Release.gpg
0.296 Ign http://security.debian.org jessie/updates Release
0.300 Ign http://deb.debian.org jessie-updates Release.gpg
0.307 Err http://security.debian.org jessie/updates/main amd64 Packages
0.307
0.312 Ign http://deb.debian.org jessie Release
0.318 Err http://security.debian.org jessie/updates/main amd64 Packages
0.318
0.327 Ign http://deb.debian.org jessie-updates Release
0.331 Err http://security.debian.org jessie/updates/main amd64 Packages
0.331
0.348 Err http://security.debian.org jessie/updates/main amd64 Packages
0.348
0.360 Err http://security.debian.org jessie/updates/main amd64 Packages
0.360 404 Not Found [IP: 151.101.2.132 80]
0.450 Err http://deb.debian.org jessie/main amd64 Packages
0.450 404 Not Found
0.462 Err http://deb.debian.org jessie-updates/main amd64 Packages
0.462 404 Not Found
0.463 W: Failed to fetch http://security.debian.org/dists/jessie/updates/main/binary-amd64/Packages 404 Not Found [IP: 151.101.2.132 80]
0.463
0.463 W: Failed to fetch http://deb.debian.org/debian/dists/jessie/main/binary-amd64/Packages 404 Not Found
0.463
0.463 W: Failed to fetch http://deb.debian.org/debian/dists/jessie-updates/main/binary-amd64/Packages 404 Not Found
0.463
0.463 E: Some index files failed to download. They have been ignored, or old ones used instead.
------
Dockerfile:4
--------------------
3 | # OS and required software updates
4 | >>> RUN apt-get update && \
5 | >>> apt-get install -y git zip unzip
6 |
--------------------
ERROR: failed to solve: process "/bin/sh -c apt-get update && apt-get install -y git zip unzip" did not complete successfully: exit code: 100
Something is not right with it, I guess the version is too old?