chore: exclude .git and build artifacts from Docker context

Author: Algorithm5838

.dockerignore

@@ -18,3 +18,28 @@ uploads
 **/*.db
 _test
 backend/data/*
+
+.git
+cypress/
+test/
+banner.png
+demo.png
+docker-compose*.yaml
+Makefile
+run.sh
+run-compose.sh
+run-ollama-docker.sh
+update_ollama_models.sh
+confirm_remove.sh
+contribution_stats.py
+hatch_build.py
+pyproject.toml
+uv.lock
+.pre-commit-config.yaml
+README.md
+TROUBLESHOOTING.md
+CODE_OF_CONDUCT.md
+LICENSE
+LICENSE_HISTORY
+LICENSE_NOTICE
+CONTRIBUTOR_LICENSE_AGREEMENT