fix: Resolve shellcheck warnings (#97)

.github/workflows/check.yml

@@ -1,5 +1,7 @@
 on: [workflow_call]
+
 name: "Check"
+
 permissions: {}
 
 jobs:
@@ -15,16 +17,19 @@ jobs:
             name: Run ShellCheck
             uses: ludeeus/action-shellcheck@master
             env:
-          SHELLCHECK_OPTS: -x --source-path=src -e SC2114 -e SC2129 -e SC2034 -e SC1087 -e SC2317 -e SC2046
+              SHELLCHECK_OPTS: >-
+                -x
+                --source-path=src
+                -e SC2129
+                -e SC2034
+                -e SC2317
           -
             name: Lint Dockerfile
             uses: hadolint/hadolint-action@v3.3.0
             with:
               dockerfile: Dockerfile
-          ignore: DL3008,DL3018,DL3020,DL3029,DL3059,DL4006,DL4001,SC2114,DL3006,DL3027
+              ignore: DL3008,DL3018,DL3020,DL3029,DL3059,DL4001,DL4006,DL3006
               failure-threshold: warning
           -
             name: Validate JSON and YML files
-        uses: GrantBirki/json-yaml-validate@v5.0.0
-        with:
-          yaml_exclude_regex: ".*\\kubernetes\\.yml$"
+            uses: GrantBirki/json-yaml-validate@v5

Dockerfile

@@ -187,7 +187,8 @@ IUD
   sed -i "s|the Pxvirt Powered by Lierfang\.|Proxmox for Docker v${VERSION_ARG}.|g" /usr/bin/pvebanner
 
   # Remove kernel modules and boot files — useless in a container (~960 MB)
-  rm -rf /usr/lib/modules /boot
+  rm -rf /usr/lib/modules
+  find /boot -mindepth 1 -delete
 
   # Remove hardware firmware blobs — no physical hardware in a container (~520 MB)
   rm -rf /usr/lib/firmware