Optimize .dockerignore and .gitignore for local context

* Updates .dockerignore to exclude /.git/, /.gitignore, and /target/
  to optimize the build context transfer since switching to local ref.
* Standardizes both files with leading and trailing slashes for
  increased precision (root-anchoring and directory targeting).
* Organizes entries alphabetically to improve maintainability.

.dockerignore

@@ -1,4 +1,7 @@
-scripts
-.github
-.editorconfig
-.pre-commit-hooks.yaml
+/.editorconfig
+/.git/
+/.github/
+/.gitignore
+/.pre-commit-hooks.yaml
+/scripts/
+/target/

.gitignore

@@ -1,6 +1,6 @@
-target
 *.bk
-.DS_Store
 *.out.png
-/.idea
-/node_modules
+.DS_Store
+/.idea/
+/node_modules/
+/target/