fix(ci): disable husky in backend Docker build

Author: RustyRory

saintBarthVolleyApp/backend/Dockerfile

@@ -3,6 +3,7 @@ FROM node:20-alpine
 WORKDIR /usr/src/app
 
 COPY package*.json ./
+ENV HUSKY=0
 RUN npm install --omit=dev
 
 COPY . .