Adapt deployment for Appliku-managed EC2 (Dockerfile + Procfile)

[Copilot]

The repo was set up for raw EC2 (manual SSH + docker compose). Deployment is actually via Appliku, which builds from a Dockerfile and drives processes via Procfile — no manual server access needed.

New files

• Dockerfile — FROM etherpad/etherpad:2.6.1 (pinned; Appliku requires a buildable image in the repo)
• Procfile — web: node /opt/etherpad-lite/src/node/server.js (tells Appliku how to start the process)

Updated files

• docker-compose.yml / docker-compose.rds.yml — pin etherpad/etherpad:latest → 2.6.1 for consistency
• .env.example — split into two clearly labelled sections: local-dev (POSTGRES_* bundled sidecar) vs production (DB_* set in Appliku dashboard)
• README.md — replace manual EC2 shell-script section with a 4-step Appliku guide; expand config table to include production DB_* vars; note that docker-compose.yml is local-dev only

Reviewed and not adopted

• appliku/django-docker-tutorial — same patterns, Django/Python stack, nothing applicable
• appliku/pgbackups3 — PostgreSQL → S3 backup sidecar; no backups requested, left out per "use only if needed"

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[Copilot]

Pull request overview

Updates the repository to support Appliku-managed deployments by providing an in-repo Docker build (Dockerfile) and an explicit process start command (Procfile), while aligning local development and documentation with the new deployment model.

Changes:

• Add Dockerfile (pinned etherpad/etherpad:2.6.1) and Procfile for Appliku builds/process management.
• Introduce/adjust Compose configs for local dev (docker-compose.yml) and external Postgres (docker-compose.rds.yml) using the same pinned Etherpad version.
• Rework .env.example and README.md to document local vs production (Appliku) configuration via environment variables.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
Dockerfile	Adds a buildable image definition for Appliku using a pinned Etherpad base image.
Procfile	Defines the web process command for Appliku to start Etherpad.
docker-compose.yml	Local-dev Compose setup with bundled Postgres and pinned Etherpad image.
docker-compose.rds.yml	Compose variant targeting an external Postgres (e.g., RDS) with pinned Etherpad image.
.env.example	Splits guidance for local bundled Postgres vs production DB_* variables.
README.md	Replaces manual EC2 steps with an Appliku workflow and expands configuration docs.

Comments suppressed due to low confidence (2)

README.md:21

• The quick start uses open http://localhost:9001, which is macOS-specific and will fail on Linux/Windows. Consider changing this to a platform-neutral instruction (e.g., “visit http://localhost:9001 in your browser”) or mention alternatives like xdg-open/start.

# 3. Open Etherpad in your browser
open http://localhost:9001

**.env.example:18**
* This line sets `TRUST_PROXY=false` immediately after noting it’s “always true on Appliku”. If this file is meant to be copied as-is for local dev, consider rewording the comment to avoid implying the value should be `true` here (or set it to `true` and add an explicit note for local dev).

Set to true if Etherpad is behind a reverse proxy (always true on Appliku)

TRUST_PROXY=false

</details>



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