fix: update Dockerfile to copy mise.toml from tools-config directory and add justfile for build and test automation

justfile

@@ -0,0 +1,22 @@
+set shell := ["bash", "-c"]
+
+IMAGE := env("IMAGE", "dev-tools")
+VERSION := env("VERSION", "latest")
+
+# Setup environment
+setup:
+  mise install
+
+# Build the Docker image
+build:
+  docker build -t {{IMAGE}}:{{VERSION}} .
+
+# Tests inside the docker image
+test:
+  docker run --rm {{IMAGE}}:{{VERSION}} sh -c "\
+    mise --version \
+    && python --version \
+    && node --version"
+
+push:
+  docker push {{IMAGE}}:{{VERSION}}