Replace S3 storage with Docker-mounted filesystem

- Add Docker and Compose deployment with persistent HTML and Postgres volumes
- Remove AWS storage configuration and dependency
- Document local Docker setup and filesystem storage

.dockerignore

@@ -0,0 +1,11 @@
+.git
+.gitignore
+node_modules
+data
+*.md
+skills
+bin
+LICENSE
+docker-compose.yml
+Dockerfile
+.dockerignore