further improvements to build system

frontend/.dockerignore

@@ -1,4 +1,3 @@
-node_modules
-.next
-
-.dockerignore
+**/node_modules
+**/.next
+**/dist

frontend/Dockerfile

@@ -1,13 +1,19 @@
-FROM node:lts-bookworm-slim
+# Build step to leave behind any building artifacts / etc
+FROM node:21-alpine AS build
 USER node
-WORKDIR /home/src/app
+WORKDIR /app
 
 # Due to Docker's caching system this makes rebuilding the docker image much faster
-COPY package.json package.json
-COPY package-lock.json package-lock.json
-RUN yarn install --production --immutable --immutable-cache && yarn cache clean
+COPY yarn.lock package.json ./
+RUN yarn install --production --immutable --immutable-cache --check-cache && yarn cache clean
+
+# Minimal image for the final docker container
+FROM node:lts-bookworm-slim AS prod
+WORKDIR /home/src/app
 
+COPY --from=builder --chown=node /app/node_modules ./node_modules
 COPY . .
+
 RUN yarn build
 
 # TODO: currently, we're committing secrets to the built image as it is neccessary for the API

frontend/package.json

@@ -45,5 +45,7 @@
   },
   "devDependencies": {
     "@types/react": "^18.2.64"
-  }
+  },
+  "main": "index.js",
+  "license": "MIT"
 }