Optimize docker image size (#91)

* Move prisma to runtime dependencies

* Optimize Dockerfile and build script

* Fix: remove mention of generated next-env.d.ts in Dockerfile

* Add missing reset.d.ts file to Dockerfile

* Remove compression steps from Dockerfile and entrypoint script

* Add an env file with mocked env vars added for Docker production builds

* Use server actions to get runtime env vars

* Refactor types and names

* Rollback serverActions, use parsed Zod object for runtime env

* Reintroduce featureFlags object to avoid passing secret envs to the frontend

* Improve string to boolean coercion

Co-authored-by: Sebastien Castiel <sebastien@castiel.me>

* Run prettier autoformat

* Fix type issue, rename function to match behaviour better

---------

Co-authored-by: Lauri Vuorela <lauri.vuorela@gmail.com>
Co-authored-by: Sebastien Castiel <sebastien@castiel.me>

Dockerfile

@@ -1,22 +1,47 @@
-FROM node:21-slim as base
+FROM node:21-alpine as base
+
+WORKDIR /usr/app
+COPY ./package.json \
+     ./package-lock.json \
+     ./next.config.js \
+     ./tsconfig.json \
+     ./reset.d.ts \
+     ./tailwind.config.js \
+     ./postcss.config.js ./
+COPY ./scripts ./scripts
+COPY ./prisma ./prisma
+COPY ./src ./src
+
+RUN apk add --no-cache openssl && \
+    npm ci --ignore-scripts && \
+    npx prisma generate
+
+ENV NEXT_TELEMETRY_DISABLED=1
+
+COPY scripts/build.env .env
+RUN npm run build
+
+RUN rm -r .next/cache
+
+FROM node:21-alpine as runtime-deps
+
+WORKDIR /usr/app
+COPY --from=base /usr/app/package.json /usr/app/package-lock.json ./
+COPY --from=base /usr/app/prisma ./prisma
+
+RUN npm ci --omit=dev --omit=optional --ignore-scripts && \
+    npx prisma generate
+
+FROM node:21-alpine as runner
 
 EXPOSE 3000/tcp
 WORKDIR /usr/app
-COPY ./ ./
 
-RUN apt update && \
-    apt install openssl -y && \
-    apt clean && \
-    apt autoclean && \
-    apt autoremove && \
-    npm ci --ignore-scripts && \
-    npm install -g prisma && \
-    prisma generate
+COPY --from=base /usr/app/package.json /usr/app/package-lock.json ./
+COPY --from=runtime-deps /usr/app/node_modules ./node_modules
+COPY ./public ./public
+COPY ./scripts ./scripts
+COPY --from=base /usr/app/prisma ./prisma
+COPY --from=base /usr/app/.next ./.next
 
-# env vars needed for build not to fail
-ARG POSTGRES_PRISMA_URL
-ARG POSTGRES_URL_NON_POOLING
-
-RUN npm run build
-
-ENTRYPOINT ["/usr/app/scripts/container-entrypoint.sh"]
+ENTRYPOINT ["/bin/sh", "/usr/app/scripts/container-entrypoint.sh"]