Make node-sass dependents optional to speed up build process

Dockerfile

@@ -4,15 +4,12 @@ ENV DATABASE_PATH db/wedding.db
 ENV PORT 80
 EXPOSE 80
 
-# Install additional dependencies
-RUN apk add --no-cache make gcc g++ python
-
 # Copy app
 COPY ./ /usr/src/app
 WORKDIR /usr/src/app
 
 # Install dev dependencies and build release
-RUN npm install --silent
+RUN npm install --no-optional --silent
 RUN npm run build --release --silent
 
 WORKDIR /usr/src/app/build