Update Docker, dependencies, S3 compatibility, and documentation

.env.example

@@ -0,0 +1,19 @@
+# Database
+DATABASE_URL=
+DATABASE_PUBLIC_URL=
+USE_PUBLIC_URL=false
+
+# S3 / R2 (S3-compatible storage)
+R2_ENDPOINT=
+R2_BUCKET_NAME=
+R2_ACCESS_KEY=
+R2_SECRET_KEY=
+S3_REGION=us-east-1
+
+# Backup settings
+MAX_BACKUPS=7
+BACKUP_PREFIX=
+FILENAME_PREFIX=backup
+DUMP_FORMAT=dump
+BACKUP_PASSWORD=
+BACKUP_TIME=00:00

CONTRIBUTING

@@ -0,0 +1,28 @@
+# Contributing to Postgres-to-R2 Backup
+
+Thanks for your interest in contributing 🎉  
+All contributions are welcome — bug reports, documentation improvements, and code changes.
+
+---
+
+## Getting Started
+
+1. Fork the repository
+2. Clone your fork locally
+3. Create a feature branch from `main`
+4. Submit a pull request against `main`
+
+---
+
+## Development
+
+### Requirements
+- Python 3.9+
+- PostgreSQL client tools (`pg_dump`)
+- pip
+- (Optional) Docker
+
+### Local Setup
+```bash
+pip install -r requirements.txt
+python main.py

Dockerfile

@@ -11,8 +11,10 @@ RUN pip install --prefix=/install -r /app/requirements.txt
 
 FROM python:3.12-slim
 
+ENV PYTHONUNBUFFERED=1
+
 RUN apt-get update && \
-    apt-get install -y postgresql-client gzip && \
+    apt-get install -y --no-install-recommends postgresql-client gzip && \
     rm -rf /var/lib/apt/lists/*
 
 COPY --from=builder /install /usr/local

README.md

@@ -1,6 +1,14 @@
-# Postgres-to-R2 Backup
+![License](https://img.shields.io/badge/license-MIT-blue.svg)
+![Python](https://img.shields.io/badge/python-3.12-blue)
+![Storage](https://img.shields.io/badge/storage-S3--compatible-orange)
+![Database](https://img.shields.io/badge/database-PostgreSQL-336791)
+![Deploy](https://img.shields.io/badge/deploy-Railway-purple)
+![Docker](https://img.shields.io/badge/docker-supported-blue)
 
-A lightweight automation service that creates scheduled PostgreSQL backups and securely uploads them to **Cloudflare R2 object storage**.  
+# Postgres-to-R2 Backup (S3-Compatible)
+
+A lightweight automation service that creates scheduled PostgreSQL backups and securely uploads them to **S3-compatible object storage**
+such as **Cloudflare R2, AWS S3, Wasabi, Backblaze B2, or MinIO**.  
 Designed specifically as a **Railway deployment template**, with built-in support for Docker and cron scheduling.
 
 ---
@@ -9,12 +17,16 @@ Designed specifically as a **Railway deployment template**, with built-in suppor
 
 - 📦 **Automated Backups** — scheduled daily or hourly PostgreSQL backups  
 - 🔐 **Optional Encryption** — gzip compression or 7z encryption with password  
-- ☁️ **Cloudflare R2 Integration** — seamless S3-compatible uploads  
+- ☁️ **Cloudflare R2 Integration** — seamless S3-compatible storage support
 - 🧹 **Retention Policy** — automatically delete old backups  
 - 🔗 **Flexible Database URLs** — supports private and public PostgreSQL URLs  
-- ⚡ **Optimized Performance** — parallel pg_dump and multipart R2 uploads  
+- ⚡ **Optimized Performance** — parallel pg_dump and multipart S3 uploads
 - 🐳 **Docker Ready** — portable, lightweight container  
 - 🚀 **Railway Template First** — no fork required for normal usage  
+<<<<<<< HEAD
+=======
+- 🪣 **S3-Compatible Storage** — works with R2, AWS S3, Wasabi, B2, MinIO
+>>>>>>> 20e6dd1 (Update Docker, dependencies, S3 compatibility, and documentation)
 
 ---
 
@@ -29,7 +41,7 @@ Designed specifically as a **Railway deployment template**, with built-in suppor
 
 ---
 
-## 🔧 Environment Variables
+## 🔧 Environment Variables (S3-Compatible)
 
 ```env
 DATABASE_URL=           # PostgreSQL database URL (private)
@@ -40,15 +52,41 @@ DUMP_FORMAT=dump        # sql | plain | dump | custom | tar
 FILENAME_PREFIX=backup  # Backup filename prefix
 MAX_BACKUPS=7           # Number of backups to retain
 
-R2_ACCESS_KEY=          # Cloudflare R2 access key
+R2_ENDPOINT=            # S3 endpoint URL
-R2_SECRET_KEY=          # Cloudflare R2 secret key
+R2_BUCKET_NAME=         # Bucket name
-R2_BUCKET_NAME=         # R2 bucket name
+R2_ACCESS_KEY=          # Access key
-R2_ENDPOINT=            # R2 endpoint URL
+R2_SECRET_KEY=          # Secret key
+S3_REGION=us-east-1     # Required for AWS S3 (ignored by R2/MinIO)
 
 BACKUP_PASSWORD=        # Optional: enables 7z encryption
 BACKUP_TIME=00:00       # Daily backup time (UTC, HH:MM)
 ```
 
+> Variable names use `R2_*` for historical reasons, but **any S3-compatible provider** can be used by changing the endpoint and credentials.
+> For AWS S3 users: ensure `S3_REGION` matches your bucket’s region.
+
+---
+
+## ☁️ Supported S3-Compatible Providers
+
+This project uses the **standard AWS S3 API via boto3**, and works with:
+
+- Cloudflare R2 (recommended)
+- AWS S3
+- Wasabi
+- Backblaze B2 (S3 API)
+- MinIO (self-hosted)
+
+### Example Endpoints
+
+| Provider | Endpoint Example |
+|--------|------------------|
+| Cloudflare R2 | `https://<accountid>.r2.cloudflarestorage.com` |
+| AWS S3 | `https://s3.amazonaws.com` |
+| Wasabi | `https://s3.wasabisys.com` |
+| Backblaze B2 | `https://s3.us-west-004.backblazeb2.com` |
+| MinIO | `http://localhost:9000` |
+
 ---
 
 ## ⏰ Railway Cron Jobs
@@ -84,6 +122,12 @@ It can run on **any platform** that supports:
 - Environment variables
 - Long-running background processes or cron
 
+<<<<<<< HEAD
+=======
+> Docker images use **Python 3.12** by default.  
+> Local execution supports **Python 3.9+**.
+
+>>>>>>> 20e6dd1 (Update Docker, dependencies, S3 compatibility, and documentation)
 ### Supported Environments
 
 - Local machine (Linux / macOS / Windows*)
@@ -108,14 +152,33 @@ python main.py
 
 ### Run with Docker (Optional)
 
+Build and run the image locally:
+
 ```bash
 docker build -t postgres-to-r2-backup .
 docker run --env-file .env postgres-to-r2-backup
-
-> Ensure the container is allowed to run continuously when not using an external cron scheduler.
 ```
 
-All scheduling uses **UTC by default** to ensure consistent behavior across platforms.
+> Ensure the container is allowed to run continuously when not using an external cron scheduler.
+
+> All scheduling uses **UTC** by default (e.g. Malaysia UTC+8 → set `BACKUP_TIME=16:00` for midnight).
+
+### Run from Prebuilt Docker Image
+
+If you downloaded a prebuilt Docker image archive (`.tar` or `.tar.gz`), you can run it without building locally:
+
+```bash
+# Extract the archive (if compressed)
+tar -xzf postgres-to-r2-backup_v1.0.0.tar.gz
+
+# Load the image into Docker
+docker load -i postgres-to-r2-backup_v1.0.0.tar
+
+# Run the container
+docker run --env-file .env postgres-to-r2-backup:v1.0.0
+```
+
+> Prebuilt images are architecture-specific (amd64 / arm64).
 
 ---
 
@@ -132,7 +195,7 @@ All scheduling uses **UTC by default** to ensure consistent behavior across plat
   Never commit `.env` files to version control.
 
 - **Encrypted backups (optional)**  
-  Set `BACKUP_PASSWORD` to enable encrypted backups using 7z before uploading to Cloudflare R2.
+  Set `BACKUP_PASSWORD` to enable encrypted backups using 7z before uploading to S3-compatible storage.
 
 - **Least privilege access**  
   Use a PostgreSQL user with read-only access where possible, and restrict R2 credentials to the required bucket only.

main.py

@@ -1,9 +1,9 @@
 import os
 import subprocess
 import boto3
+from boto3.session import Config
 from datetime import datetime, timezone
 from boto3.s3.transfer import TransferConfig
-from urllib.parse import urlparse
 from dotenv import load_dotenv
 import time
 import schedule
@@ -27,6 +27,7 @@ DUMP_FORMAT = os.environ.get("DUMP_FORMAT", "dump")
 BACKUP_PASSWORD = os.environ.get("BACKUP_PASSWORD")
 USE_PUBLIC_URL = os.environ.get("USE_PUBLIC_URL", "false").lower() == "true"
 BACKUP_TIME = os.environ.get("BACKUP_TIME", "00:00")
+S3_REGION = os.environ.get("S3_REGION", "us-east-1")
 
 def log(msg):
     print(msg, flush=True)
@@ -118,7 +119,11 @@ def run_backup():
             "s3",
             endpoint_url=R2_ENDPOINT,
             aws_access_key_id=R2_ACCESS_KEY,
-            aws_secret_access_key=R2_SECRET_KEY
+            aws_secret_access_key=R2_SECRET_KEY,
+            region_name=S3_REGION,
+            config=Config(
+                s3={"addressing_style": "path"}
+            )
         )
 
         config = TransferConfig(

requirements.txt

@@ -1,4 +1,4 @@
-boto3==1.42.15
+boto3==1.42.26
 psycopg2-binary==2.9.10
 python-dotenv==1.2.1
 py7zr==1.1.0