Change to bash in shellcheck and rename dockcross script to dockcross.sh

Change to bash in shellcheck and rename dockcross script to dockcross.sh

Signed-off-by: Bensuperpc <bensuperpc@gmail.com>

.github/workflows/shellcheck.yml

@@ -22,5 +22,7 @@ jobs:
     - name: Run ShellCheck
       uses: ludeeus/action-shellcheck@master
       with:
-        severity: warning
-        format: gcc
+        severity: error
+        format: gcc
+      env:
+        SHELLCHECK_OPTS: bash

imagefiles/dockcross.sh

@@ -6,11 +6,11 @@ DEFAULT_DOCKCROSS_IMAGE=dockcross/base  # DO NOT MOVE THIS LINE (see entrypoint.
 # Helpers
 #
 err() {
-    echo -e >&2 ERROR: $@\\n
+    echo -e >&2 "ERROR: $*\n"
 }
 
 die() {
-    err $@
+    err "$*"
     exit 1
 }