A lightweight billing and subscription management portal for Arcline IT customers. Customers can register, view their subscriptions and invoices, and manage their plans via Stripe Checkout.

Features

Customer registration and login with bcrypt password hashing
Subscription management via Stripe (checkout, cancellation)
Invoice history with PDF links
Password reset via email
Stripe webhook processing
Rate limiting and security headers

Requirements

Go 1.22+
A Stripe account
SMTP credentials for email (password resets)

Setup

Copy the example environment file and fill in your values:
```
cp .env.example .env
```
Build the binary:
```
go build -o billing .
```
Run:
```
./billing
```
The server listens on 0.0.0.0:8082 by default. The SQLite database and schema are created automatically on first run.

Environment Variables

Variable	Default	Description
`PORT`	`8082`	HTTP listen port
`DATABASE_PATH`	`./arcline-billing.db`	SQLite database file path
`BASE_URL`	—	Public base URL (e.g. `https://client.arclineit.com`) — used for redirect URLs and password reset links
`SESSION_SECURE`	`true`	Set `Secure` flag on session cookies (disable for local HTTP dev)
`STRIPE_SECRET_KEY`	—	Stripe secret API key
`STRIPE_WEBHOOK_SECRET`	—	Stripe webhook signing secret
`SMTP_HOST`	—	SMTP server hostname
`SMTP_PORT`	—	SMTP server port
`SMTP_USER`	—	SMTP username
`SMTP_PASS`	—	SMTP password
`SMTP_FROM`	—	From address for outgoing email

Stripe Price IDs

Configure the price IDs for each plan tier:

Variable	Plan
`STRIPE_PRICE_SHARED_STARTER`	Shared Hosting — Starter
`STRIPE_PRICE_SHARED_PRO`	Shared Hosting — Pro
`STRIPE_PRICE_SHARED_BUSINESS`	Shared Hosting — Business
`STRIPE_PRICE_WP_STARTER`	WordPress Hosting — Starter
`STRIPE_PRICE_WP_PRO`	WordPress Hosting — Pro
`STRIPE_PRICE_WP_BUSINESS`	WordPress Hosting — Business
`STRIPE_PRICE_VPS_1`	VPS — Tier 1
`STRIPE_PRICE_VPS_2`	VPS — Tier 2
`STRIPE_PRICE_VPS_3`	VPS — Tier 3
`STRIPE_PRICE_VPS_4`	VPS — Tier 4

Stripe Webhooks

Point your Stripe webhook to POST /webhook. The following events are handled:

checkout.session.completed — creates a subscription record
invoice.paid — records a paid invoice
invoice.payment_failed — updates subscription status
customer.subscription.deleted — marks subscription as cancelled