fix: update dockerfile & use NPM droplet

Dockerfile

@@ -1,11 +1,13 @@
 # pull pre-configured and updated build environment
-FROM debian:12.10-slim AS build-system
+FROM debian:testing-20250317-slim AS build-system
 
 # setup workdir
 RUN mkdir /build
 WORKDIR /build
 
 # install dependencies and build
+RUN apt-get update -y
+RUN apt-get install node-corepack -y
 RUN corepack enable
 COPY . .
 RUN NUXT_TELEMETRY_DISABLED=1 yarn install