update readme

README.md

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 # grout
-Geo tile server
+Grout serves map tiles (mbtiles) data which can be consumed in web front ends by Leaflet etc.
 
 ## Development
 
+Grout is implemented as an [express](https://expressjs.com/) server in Typescript.
+
+Developed with node v22.
+
+Run in dev mode with hot reloading: `npm run dev`
+
+Build for production: `npm run build`
+
+Run in production mode: `npm run prod`
+
+In both modes, local run is on port 5000. Port is configured in `config/grout.config.json`
+
 ## Tests
 
+The server needs to be running for the integration tests to pass. 
+
+Run unit and integration tests with `npm run test`
+
+# Lint
+
+Run lint with `npm run lint`. To do any possible automatic fixes run `npm run lint-fix`.
+
 ## Docker
+See the `docker` folder for Dockerfile and scripts to build, push, run, stop, and push branch tag for the image. The run 
+script always pulls. The image is pushed to the ghcr.io registry.