Added Dev Dockerfile

Dockerfile.dev

@@ -0,0 +1,17 @@
+FROM node:20-alpine
+
+WORKDIR /app
+
+# nur package-Dateien zuerst, damit Docker-Cache greift
+COPY package*.json ./
+
+RUN npm install
+
+# Rest des Codes
+COPY . .
+
+# Vite Dev-Server
+EXPOSE 1420
+
+CMD ["npm", "run", "dev", "--", "--host"]
+