chore: improve container build and deployment configuration

- Add common system directories to .dockerignore to prevent accidental inclusion
- Reorder Dockerfile instructions for better clarity and performance
- Remove remote deployment targets from Makefile to simplify local development workflow

.dockerignore

@@ -19,3 +19,15 @@ Dockerfile
 .dockerignore
 Makefile
 k8s/
+/mounts
+/proc
+/sys
+/dev
+/run
+/var/lib/containers
+/mnt
+/media
+/boot
+/lost+found
+/root
+/srv