reduce docker image size from 2gb to 300mb

shared/tsconfig.json

@@ -1,7 +1,7 @@
 {
   "extends": "../tsconfig.base.json",
   "compilerOptions": {
-    "target": "es2017",
+    "target": "es2020",
     "module": "es2020",
     "lib": ["es2020"],
 

support/build.sh

@@ -25,11 +25,17 @@ echo "Building version $VERSION"
 
 docker buildx create --append --use --name picsur
 
+docker buildx build \
+  --push \
+  -t "$PACKAGE_URL-stage1:$VERSION" \
+  -t "$PACKAGE_URL-stage1:latest" \
+  -f ./picsur-stage1.Dockerfile ..
+
 docker buildx build \
   --platform linux/amd64,linux/arm64 \
   --push \
   -t "$PACKAGE_URL:$VERSION" \
   -t "$PACKAGE_URL:latest" \
-  -f ./picsur.Dockerfile ..
+  -f ./picsur-stage2.Dockerfile ..
 
 echo "Done pushing $PACKAGE_URL:$VERSION"

support/picsur-stage1.Dockerfile

@@ -0,0 +1,25 @@
+# This dockerfile only builds the javascript part of the project, so tsc and angular compilation
+
+FROM node:18.8 AS BUILDER_STAGE1
+
+SHELL ["/bin/bash", "-c"]
+
+ADD . /picsur
+WORKDIR /picsur
+
+RUN yarn workspaces focus -A
+
+RUN yarn workspace picsur-shared build
+RUN yarn workspace picsur-frontend build
+RUN yarn workspace picsur-backend build
+
+RUN mkdir -p /trimmed
+
+RUN cp -r --parents ./{package.json,yarn.lock,.yarnrc.yml,branding} /trimmed
+RUN cp -r --parents ./{frontend,backend,shared}/{dist,package.json} /trimmed
+
+FROM scratch
+
+WORKDIR /picsur
+ADD .yarn .yarn
+COPY --from=BUILDER_STAGE1 /trimmed ./

support/picsur-stage2.Dockerfile

@@ -0,0 +1,22 @@
+# This dockerfile than builds the production dependencies and the final image
+
+# Always fetch amd64 image
+FROM ghcr.io/rubikscraft/picsur-alpha-stage1:latest AS BUILDER_STAGE1
+
+FROM node:18.8-alpine AS BUILDER_STAGE2
+
+RUN apk add python3 build-base
+
+WORKDIR /picsur
+COPY --from=BUILDER_STAGE1 /picsur ./
+
+RUN yarn workspaces focus -A --production
+
+FROM node:18.8-alpine
+
+ENV PICSUR_PRODUCTION=true
+
+WORKDIR /picsur
+COPY --from=BUILDER_STAGE2 /picsur ./
+
+CMD yarn workspace picsur-backend start:prod

support/picsur.Dockerfile

@@ -1,17 +0,0 @@
-FROM node:18.8
-
-# Sorry for the humongous docker container this generates
-# Maybe I'll trim it down some day
-
-ENV PICSUR_PRODUCTION=true
-
-ADD . /picsur
-WORKDIR /picsur
-
-RUN yarn install --immutable
-
-RUN yarn workspace picsur-shared build
-RUN yarn workspace picsur-frontend build
-RUN yarn workspace picsur-backend build
-
-CMD yarn workspace picsur-backend start:prod