diff --git a/docker/Dockerfile b/docker/Dockerfile
index f10a608..ceb15ca 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -51,9 +51,11 @@ COPY docker/next.config.docker.ts ./apps/web/next.config.ts
 
 ENV NEXT_TELEMETRY_DISABLED=1
 ENV NODE_ENV=production
-# Cap V8 heap so we get a clean JS OOM instead of a kernel SIGKILL (exit 255)
-# if memory pressure spikes during the build on small hosts.
-ENV NODE_OPTIONS=--max-old-space-size=1536
+# Give the Next.js webpack compile enough V8 heap headroom on the Coolify host.
+# Sized to ~70% of the 4 GB host RAM so kernel + dockerd + concurrent runtime
+# COPYs from collab/mcp still have breathing room. Below ~2 GB, the compile
+# spirals into GC churn and gets oom-killed (exit 255 with no Docker error).
+ENV NODE_OPTIONS=--max-old-space-size=2560
 RUN pnpm exec turbo build --filter=@tasks/web
 
 
diff --git a/docker/docker-compose.coolify.yml b/docker/docker-compose.coolify.yml
index 7f7134c..15f3d8a 100644
--- a/docker/docker-compose.coolify.yml
+++ b/docker/docker-compose.coolify.yml
@@ -19,9 +19,13 @@
 #
 # Build strategy:
 #   All three services share docker/Dockerfile and select runtime via `target:`.
-#   The shared `deps` stage (pnpm install for the whole workspace) is hashed
-#   identically across targets, so BuildKit runs it ONCE even when web/collab/mcp
-#   build in parallel — keeps build-host RAM bounded.
+#   The shared `deps` stage is hashed identically across targets, so BuildKit
+#   runs `pnpm install` ONCE.
+#
+#   `web` declares depends_on collab+mcp so Compose builds the lightweight
+#   services first and the heavy `next build` (peak ~2.5 GB heap) gets the host
+#   effectively to itself instead of fighting concurrent runtime-stage COPYs
+#   for memory.
 
 services:
   web:
@@ -29,6 +33,9 @@ services:
       context: .
       dockerfile: docker/Dockerfile
       target: web
+    depends_on:
+      - collab
+      - mcp
     restart: unless-stopped
     environment:
       # Coolify FQDN magic var — set the domain in the Coolify UI for this service.