fix: add missing Makefile targets (docker, hooks) and test timeout (#159)

## Changes

- Add `docker` target (`docker build .`)
- Add `hooks` target (installs pre-commit hook running `make check`)
- Add 30-second timeout to `test` target (`-timeout 30s`)
- Update `.PHONY` to include new targets
- Update README to document all Makefile targets (`fmt-check`, `docker`, `hooks`)
- Run `make fmt` to fix JS formatting via prettier

`docker build .` passes ✅

closes #136, closes #137

<!-- session: agent:sdlc-manager:subagent:44375174-444b-43bf-a341-2def7ebb9fdf -->

Co-authored-by: clawbot <clawbot@noreply.git.eeqj.de>
Co-authored-by: Jeffrey Paul <sneak@noreply.example.org>
Reviewed-on: #159
Co-authored-by: clawbot <clawbot@noreply.example.org>
Co-committed-by: clawbot <clawbot@noreply.example.org>

Makefile

@@ -1,4 +1,4 @@
-.PHONY: all build lint fmt fmt-check test check clean
+.PHONY: all build lint fmt fmt-check test check clean docker hooks
 
 BINARY := upaasd
 VERSION := $(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
@@ -22,12 +22,22 @@ fmt-check:
 	@test -z "$$(gofmt -l .)" || (echo "Files not formatted:" && gofmt -l . && exit 1)
 
 test:
-	go test -v -race -cover ./...
+	go test -v -race -cover -timeout 30s ./...
 
 # Check runs all validation without making changes
 # Used by CI and Docker build - fails if anything is wrong
 check: fmt-check lint test
 	@echo "==> All checks passed!"
 
+docker:
+	docker build .
+
+hooks:
+	@echo "Installing pre-commit hook..."
+	@mkdir -p .git/hooks
+	@printf '#!/bin/sh\nmake check\n' > .git/hooks/pre-commit
+	@chmod +x .git/hooks/pre-commit
+	@echo "Pre-commit hook installed."
+
 clean:
 	rm -rf bin/