ci: fix kaniko builds and base images

.woodpecker.yml

@@ -6,7 +6,8 @@ steps:
   - name: build-and-push
     image: registry.nxtgauge.com/kaniko:2.1.1
     settings:
-      registry: registry.nxtgauge.com
+      registry:
+        from_secret: REGISTRY_HOSTPORT
       username:
         from_secret: REGISTRY_USERNAME
       password:

Dockerfile

@@ -1,5 +1,5 @@
 # Multi-stage build with memory optimization
-FROM node:20-slim AS builder
+FROM registry.nxtgauge.com/node:20-alpine AS builder
 WORKDIR /app
 
 # Skip browser downloads
@@ -13,7 +13,7 @@ RUN echo "VITE_API_URL=http://localhost:9100" > .env && \
     echo "VITE_RUST_API_URL=http://localhost:9100/api" >> .env
 
 # Install build dependencies
-RUN apt-get update && apt-get install -y python3 make g++ git && rm -rf /var/lib/apt/lists/*
+RUN apk add --no-cache python3 make g++ git
 
 # Copy package files
 COPY package*.json ./