Fix Dockerfile and add internal/pwas/utils (#100)

Co-authored-by: James Mills <prologic@shortcircuit.net.au>
Reviewed-on: #100
Reviewed-by: mlctrez <mlctrez@noreply@mills.io>

Dockerfile

@@ -30,6 +30,7 @@ COPY ./internal/pwa/*.go ./internal/pwa/
 COPY ./internal/pwa/components/*.go ./internal/pwa/components/
 COPY ./internal/pwa/storage/*.go ./internal/pwa/storage/
 COPY ./internal/pwa/routes/*.go ./internal/pwa/routes/
+COPY ./internal/pwa/utils/*.go ./internal/pwa/utils/
 COPY ./internal/tui/*.go ./internal/tui/
 COPY ./internal/*.go ./internal/
 COPY ./cmd/salty-chat/*.go ./cmd/salty-chat/