To generate the md5 of the file, download the file that looks like https://github.com/backdrop/backdrop/archive/1.17.3.tar.gz (use appropriate version number). After downloading, on Linux you can run md5sum 1.17.3.tar.gz which will output the hash. Enter that into the second variable in the file.
There are two Dockerfiles where the Backdrop version needs to be updated and also update the md5 so it can ensure that the file is what it seems.
The two files: https://github.com/backdrop-ops/backdrop-docker/blob/master/1/fpm/Dockerfile and https://github.com/backdrop-ops/backdrop-docker/blob/master/1/apache/Dockerfile.
Update this section:
To generate the md5 of the file, download the file that looks like
https://github.com/backdrop/backdrop/archive/1.17.3.tar.gz
(use appropriate version number). After downloading, on Linux you can runmd5sum 1.17.3.tar.gz
which will output the hash. Enter that into the second variable in the file.