Fix Docker: Client Version Is Too Old
Separate an outdated Docker client from a pinned API or the wrong context, and check the minimum your exact Engine release accepts.
9 min read
DevOps
Explore our curated collection of articles, insights, and stories about DevOps.
36 Articles
Next.js + Strapi in Docker: fetch failed ECONNREFUSED 1337
Read the address in the error, swap localhost for the Strapi service name in server-side fetches, and keep a separate public URL for anything the browser loads.
8 min read
Next.js builds locally, fails in Docker: fix the image error
The exact same source code compiles on your laptop and crashes in the container because the container runs a Node major version your local shell does not — add sharp and the crash disappears.
9 min read
Fix Cannot find module '/dist/main' in a Docker build
Find out which file the builder stage really emitted, then fix the Dockerfile order and the TypeScript output layout so node dist/main starts.
8 min read
Fix Nginx 502 in Docker Compose: upstream localhost
Trace the upstream address in the Nginx log, prove the Node listener is reachable from the proxy, and separate a wrong host from a loopback-only bind.
7 min read
Fix Cannot find module 'dotenv' in Docker Compose (Node)
Reproduced step by step in Compose: why npm install in the Dockerfile is not enough under a bind mount, and why a new package still goes missing after a rebuild.
8 min read
Docker Hostname ENOTFOUND in Next.js Prod but Not in Dev
Why next dev reaches your Compose service while the production image build cannot resolve it, proved on Next.js 16.4.0, with a fix for the Pages Router and the App Router.
8 min read
Fix RabbitMQ ECONNREFUSED 5672 between Docker containers
Your consumer starts, RabbitMQ starts, and the first connect is refused. Fix the amqp URL, pick a healthcheck that waits for port 5672, and avoid the guest trap.
8 min read
Fix Sequelize "Cannot find /config/config.json" in Docker
Reproduced in Docker: why moving WORKDIR alone still fails, why build-time migrations cannot reach the database, and a Compose setup that migrates on start.
8 min read
Fix Docker Compose 'Exec format error' loading a library
Your app crashes on docker-compose up while it works fine outside Docker — here is why a native module refuses to load, and the three fixes that actually remove it.
9 min read
Jenkins "Invalid agent type docker specified" Fix
The Jenkinsfile is not broken — the controller just does not know what "docker" means as an agent type until the right plugin registers it.
7 min read
Fix: Sequelize authenticate() Hangs With No Success or Error
Your container logs "start connect" and then nothing — no success, no error. The connection is not failing silently; it is still trying, because pg never times out by default.
8 min read
Fix: React hot reload doesn't work in a Docker container
See why editing a file on the host leaves the container blind, reproduce it with a negative control, and pick the right polling flag for your react-scripts or Vite version.
9 min read
Fix Docker Compose environment 'unexpected type map' error
See the three wordings this error has had across Compose releases, fix the line in either valid form, and avoid the quoted look-alike that hides the error but loses the variable.
8 min read
Docker 'OCI runtime create failed': a flag after the image
See why runc tries to execute -w, why the official node image now answers node: bad option: -w, and which cause each other create-time message and exit code points to.
9 min read
Fix Docker Compose "unknown flag: --iidfile" Build Error
The flag Compose added is real; the CLI parsing it is the part that is too old. Find which docker binary your build actually runs, then fix that one.
7 min read
Fix Could not find a required file: index.html in Docker
Prove whether a volume is hiding public/index.html, fix the mount path or the COPY order, and know why docker run shows the file while Compose does not.
8 min read
Fix: sh: tsc: not found in Docker build
Two different causes produce the identical "tsc: not found" — here is how to tell them apart, and the multi-stage fix for both.
6 min read
Docker: Override or Remove ENTRYPOINT From a Base Image
Distinguish a Dockerfile override from a runtime override, then check which command the final image and container actually execute.
7 min read
Fix 'exec format error' on AWS Fargate: ARM vs x86 images
Your container runs locally but Fargate kills it on start. Check which CPU architecture the image was built for, then rebuild or change the task platform.
7 min read
Fix OCI runtime exec failed: executable file not found
The container is fine; the command you asked for is not in it. Find out what the image really ships, then install the tool or bring it in from outside.
7 min read
Fix Prisma Query Engine Library Not Found
The error 'Query engine library for current platform debian-openssl-1.1.x could not be found' stops Prisma in its tracks when you deploy to Linux containers. Here is exactly why it happens and the two-line fix that resolves it.
7 min read
MySQL 'Got an error reading communication packets' in Docker
When MySQL inside Docker aborts connections with 'Got an error reading communication packets', the root cause is usually a race between container startup and the first query. Here's how to fix it with a readiness check and timeout tuning.
7 min read
Firebase webframeworks Not Enabled in GitHub Actions: Fix
Running firebase experiments:enable webframeworks on your laptop does nothing for GitHub Actions. Here is the env var the CLI actually reads, the complete workflow, and why Firebase now steers Next.js apps to App Hosting.
8 min read
Scaleway vs AWS S3: EU Pricing & Data Residency 2026
AWS S3 is the default for object storage, but for EU-only workloads it is more expensive than necessary and you must explicitly select an EU region to satisfy GDPR data residency. Scaleway Object Storage stores every byte in Paris or Amsterdam by default — there is no US region to opt out of — uses the same S3-compatible API, and costs 25-60% less on storage depending on the tier you pick. Here is the 2026 pricing breakdown, the API parity list, and the gotchas that make Scaleway a no-go for some workloads (fewer storage classes, no Object Lambda, no Lambda@Edge equivalent).
7 min
Self-Hosted Plausible vs GA4: GDPR by Default (2026)
Google Analytics 4 is found illegal in multiple EU countries (Austria, France, Italy, Denmark, Finland, Norway, Sweden) because it transfers user data to the US. To stay compliant you need a consent banner, a Data Processing Agreement, and Consent Mode v2 — and the EU-US Data Privacy Framework on which Google relies is itself under legal threat at the EU's top court. Self-hosted Plausible Analytics collects no personal data, sets no cookies, and runs on your own server. Here is the 2026 setup, the cost, the feature gaps you should plan for (no heatmaps, no BigQuery export, no Google Ads Smart Bidding), and the deployment steps on a Hetzner VPS or a Scaleway Stardust instance.
8 min
How to Set Up Idempotency Key in Next.js (Step by Step)
A practical, production‑ready guide to adding Stripe idempotency keys in a Next.js + Supabase stack.
7 min read
Stripe Webhook Signature Verification Failed in Next.js
If Stripe webhooks return `Webhook signature verification failed`, your Next.js route is parsing the JSON before Stripe sees it. Here's the exact raw-body pattern for App Router, Pages Router, and Vercel Edge — plus the three secret-mismatch traps that cause the same error.
11 min read
Next.js + Supabase Production Launch Checklist (47 Items)
A comprehensive pre-launch audit for Next.js 15 + Supabase apps. Security, performance, observability, auth, data integrity, and operational readiness — everything that fails after launch if you skip it.
32 min read
Scaling Next.js + Supabase: 0 to 100K Users Playbook
A scaling playbook for growing a Next.js + Supabase app from zero to 100K monthly users. Every bottleneck, in the order you hit it, with citations to the official Next.js caching and Supabase connection-pooling docs.
36 min read
Next.js & Supabase Stripe Subscriptions: SaaS Guide
A complete practitioner's guide to building a robust SaaS billing system with Next.js, Supabase, and Stripe, avoiding the common pitfalls of subscription state synchronization.
Error Handling and Observability for Next.js + Supabase
Comprehensive guide to error handling, logging, monitoring, and observability for production Next.js and Supabase applications. Learn error boundaries, structured logging, performance monitoring, and debugging strategies.
30 min read
Testing Next.js + Supabase: Unit, Integration, RLS, E2E
A pragmatic testing setup: Jest for units, a local Supabase stack for integration, pgTAP for RLS policies, Playwright for E2E. With CI config and the mocks-vs-real-DB tradeoffs.
38 min read
Deploying Next.js + Supabase to Production
Complete guide to deploying Next.js and Supabase applications to production. Learn Vercel deployment, environment configuration, database migrations, CI/CD pipelines, monitoring, and scaling strategies.
38 min read
Next.js Environment Variables Undefined on Vercel? Fix
Environment variables not working on Vercel? Learn the exact configuration needed for Next.js 15 deployment with zero errors.
10 min read
Docker Tutorial 2026: Dev Environment with Compose
Step-by-step guide to creating a production-ready Docker development environment with hot reload, debugging, and Docker Compose.
10 min read