Docker Security Overhaul: Add a linter step to the `container.yaml` workflow

[josecelano]

$ docker run --rm -i hadolint/hadolint < ./Containerfile 

Unable to find image 'hadolint/hadolint:latest' locally
latest: Pulling from hadolint/hadolint
db4123164570: Pull complete 
Digest: sha256:fff226bdf9ebcc08db47fb90ee144dd770120b35c2b1cbbb46e932a650cfe232
Status: Downloaded newer image for hadolint/hadolint:latest
-:8 DL4006 warning: Set the SHELL option -o pipefail before RUN with a pipe in it. If you are using /bin/sh in an alpine image or if your shell is symlinked to busybox then consider explicitly setting your SHELL to /bin/ash, or disable this check
-:15 DL3008 warning: Pin versions in apt get install. Instead of `apt-get install <package>` use `apt-get install <package>=<version>`
-:15 DL3009 info: Delete the apt-get lists after installing something
-:15 DL3015 info: Avoid additional packages by specifying `--no-install-recommends`
-:16 DL4006 warning: Set the SHELL option -o pipefail before RUN with a pipe in it. If you are using /bin/sh in an alpine image or if your shell is symlinked to busybox then consider explicitly setting your SHELL to /bin/ash, or disable this check
-:72 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
-:75 DL4006 warning: Set the SHELL option -o pipefail before RUN with a pipe in it. If you are using /bin/sh in an alpine image or if your shell is symlinked to busybox then consider explicitly setting your SHELL to /bin/ash, or disable this check
-:75 SC2046 warning: Quote this to prevent word splitting.
-:86 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
-:89 DL4006 warning: Set the SHELL option -o pipefail before RUN with a pipe in it. If you are using /bin/sh in an alpine image or if your shell is symlinked to busybox then consider explicitly setting your SHELL to /bin/ash, or disable this check
-:89 SC2046 warning: Quote this to prevent word splitting.