build inside container on first start

Author: LucHeart

Dockerfile

@@ -4,15 +4,15 @@ ARG PNPM_VERSION=10.33.2
 ARG ALPINE_VERSION=3.23
 ARG PNPM_URL="https://github.com/pnpm/pnpm/releases/download/v${PNPM_VERSION}/pnpm-linuxstatic-x64"
 
-# --- Build stage ---
-FROM node:${NODE_VERSION}-alpine${ALPINE_VERSION} AS build
+FROM node:${NODE_VERSION}-alpine${ALPINE_VERSION}
 
 ARG PNPM_URL
 ARG GIT_BRANCH
 ARG GIT_COMMIT_SHA
 
 WORKDIR /app
 ENV DOCKER=true
+ENV NODE_ENV=production
 ENV GIT_BRANCH=${GIT_BRANCH}
 ENV GIT_COMMIT_SHA=${GIT_COMMIT_SHA}
 
@@ -25,44 +25,16 @@ COPY pnpm-lock.yaml .
 COPY pnpm-workspace.yaml .
 COPY patches/ patches/
 
-# Install deps
-RUN pnpm install --frozen-lockfile --strict-peer-dependencies
+# Install all deps (incl. dev) — needed because the build runs at container start.
+# --prod=false forces dev deps even though NODE_ENV=production is set above.
+RUN pnpm install --frozen-lockfile --strict-peer-dependencies --prod=false
 
 # Copy full source after dependencies are cached
 COPY . .
 
-# Build the app (output to /app/build)
-RUN pnpm run build
-
-
-# --- Runtime stage ---
-FROM node:${NODE_VERSION}-alpine${ALPINE_VERSION} AS runtime
+# Make entrypoint executable (in case the host bit was lost)
+RUN chmod +x /app/docker-entrypoint.sh
 
-ARG PNPM_URL
-ARG GIT_BRANCH
-ARG GIT_COMMIT_SHA
-
-WORKDIR /app
-ENV DOCKER=true
-ENV NODE_ENV=production
-ENV GIT_BRANCH=${GIT_BRANCH}
-ENV GIT_COMMIT_SHA=${GIT_COMMIT_SHA}
-
-# Install pnpm again for runtime dependency resolution
-RUN wget -qO /bin/pnpm "${PNPM_URL}" && chmod +x /bin/pnpm
-
-# App will run on port 3000
 EXPOSE 3000
 
-# Copy only required runtime files and build output
-COPY --from=build /app/package.json .
-COPY --from=build /app/pnpm-lock.yaml .
-COPY --from=build /app/pnpm-workspace.yaml .
-COPY --from=build /app/patches/ patches/
-COPY --from=build /app/build build/
-
-# Install only production dependencies
-RUN pnpm install --frozen-lockfile --strict-peer-dependencies
-
-# Start the app
-CMD ["node","build/index.js"]
+ENTRYPOINT ["/app/docker-entrypoint.sh"]

docker-entrypoint.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+set -eu
+
+if [ ! -f /app/build/index.js ]; then
+  echo "[entrypoint] No build found, running pnpm build with current env..."
+  pnpm run build
+else
+  echo "[entrypoint] Existing build found, skipping rebuild."
+fi
+
+exec node build/index.js