doc: remove Docker support artifacts

Docker/container deployment is not a supported use case for nvme-stas,
as documented in CONTAINERS.md. Remove the Dockerfile, docker-compose.yml,
.dockerignore, the two disabled Docker workflows, the hadolint job from
linters.yml, and the docker ecosystem entry from dependabot.yml.

Signed-off-by: Martin Belanger <[email protected]>

Author: Martin Belanger

.dockerignore

@@ -5,10 +5,6 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
-  - package-ecosystem: "docker"
-    directory: "/"
-    schedule:
-      interval: "weekly"
   - package-ecosystem: "pip"
     directory: "/"
     schedule:

.github/dependabot.yml

@@ -10,17 +10,6 @@ on:
 
 jobs:
 
-  docker-lint:
-    if: ${{ !github.event.act }} # skip during local actions testing
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    steps:
-      - uses: actions/checkout@v6
-      - uses: hadolint/[email protected]
-        with:
-          recursive: true
-          ignore: DL3041
-
   python-lint-Jammy:
     runs-on: ubuntu-22.04
     timeout-minutes: 30