chore(): docker-compose

Dockerfile

@@ -0,0 +1,22 @@
+FROM golang:1.24 as build
+
+WORKDIR /app
+
+# Copy module files and download dependencies
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy the rest of the application source and build
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -o /invoiceapi cmd/invoiceapi/main.go
+
+EXPOSE 8080
+
+FROM alpine:3
+# the test program:
+COPY --from=build /invoiceapi /invoiceapi
+# the tls certificates:
+# NB: this pulls directly from the upstream image, which already has ca-certificates:
+
+CMD [ "/invoiceapi" ]
+

README.md

@@ -2,28 +2,24 @@ docker run --rm -p 3030:3000 gotenberg/gotenberg:8
 
 ## Configuration
 
-This application is configured using a `config.json` file in the root of the project. You can use the `config.json.example` file as a starting point.
+This application can be configured using a `config.json` file in the root of the project, or by using environment variables. Values set in environment variables will override the values from the `config.json` file.
 
-```json
-{
-  "email": {
-    "smtp": {
-      "host": "smtp.example.com",
-      "port": 587,
-      "username": "user",
-      "password": "password"
-    },
-    "from": "from@example.com"
-  },
-  "pdf": {
-    "hostname": "http://localhost:3030"
-  },
-  "gitea": {
-    "url": "https://gitea.example.com",
-    "token": "your-gitea-token"
-  }
-}
-```
+You can use the `config.example.json` file as a starting point for your `config.json`.
+
+### Environment Variables
+
+The following environment variables can be used for configuration:
+
+| Variable              | Description                                   |
+| --------------------- | --------------------------------------------- |
+| `PDF_HOSTNAME`        | The hostname of the PDF generator (Gotenberg) |
+| `GITEA_URL`           | The URL of your Gitea instance                |
+| `GITEA_TOKEN`         | Your Gitea API token                          |
+| `EMAIL_FROM`          | The "From" address for sending emails         |
+| `EMAIL_SMTP_HOST`     | The SMTP server host                          |
+| `EMAIL_SMTP_PORT`     | The SMTP server port                          |
+| `EMAIL_SMTP_USER`     | The username for SMTP authentication          |
+| `EMAIL_SMTP_PASSWORD` | The password for SMTP authentication          |
 
 ## API Endpoints
 

docker-compose.yml

@@ -0,0 +1,22 @@
+services:
+  invoiceapi:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    ports:
+      - "8080:8080"
+    depends_on:
+      - gotenberg
+    environment:
+      - PDF_HOSTNAME=http://gotenberg:3000
+    volumes:
+      - ./config.json:/config.json
+    develop:
+      watch:
+        - action: rebuild
+          path: .
+          ignore:
+            - .git
+  gotenberg:
+    image: gotenberg/gotenberg:8
+    restart: unless-stopped

go.mod

@@ -4,6 +4,7 @@ go 1.24.5
 
 require (
 	code.gitea.io/sdk/gitea v0.21.0
+	github.com/caarlos0/env/v10 v10.0.0
 	github.com/gomarkdown/markdown v0.0.0-20250810172220-2e2c11897d1a
 	github.com/jedib0t/go-pretty/v6 v6.6.8
 	github.com/jordan-wright/email v4.0.1-0.20210109023952-943e75fe5223+incompatible

go.sum

@@ -2,6 +2,8 @@ code.gitea.io/sdk/gitea v0.21.0 h1:69n6oz6kEVHRo1+APQQyizkhrZrLsTLXey9142pfkD4=
 code.gitea.io/sdk/gitea v0.21.0/go.mod h1:tnBjVhuKJCn8ibdyyhvUyxrR1Ca2KHEoTWoukNhXQPA=
 github.com/42wim/httpsig v1.2.3 h1:xb0YyWhkYj57SPtfSttIobJUPJZB9as1nsfo7KWVcEs=
 github.com/42wim/httpsig v1.2.3/go.mod h1:nZq9OlYKDrUBhptd77IHx4/sZZD+IxTBADvAPI9G/EM=
+github.com/caarlos0/env/v10 v10.0.0 h1:yIHUBZGsyqCnpTkbjk8asUlx6RFhhEs+h7TOBdgdzXA=
+github.com/caarlos0/env/v10 v10.0.0/go.mod h1:ZfulV76NvVPw3tm591U4SwL3Xx9ldzBP9aGxzeN7G18=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davidmz/go-pageant v1.0.2 h1:bPblRCh5jGU+Uptpz6LgMZGD5hJoOt7otgT454WvHn0=

internal/api/httpinvoce/resource.go

@@ -22,7 +22,7 @@ func New(log *slog.Logger, invoice invoicer, mail mailer) *Service {
 }
 
 type invoicer interface {
-	Generate(creditor, deptor model.Entity, mindur time.Duration, rate float64, repos []invoice.Repo) (document io.ReadCloser, report report.Report, err error)
+	Generate(creditor, deptor model.Entity, mindur time.Duration, rate float64, repos []invoice.Repo) (document io.ReadCloser, report *report.Report, err error)
 }
 
 type mailer interface {

internal/config/config.go

@@ -5,37 +5,43 @@ import (
 	"os"
 
 	"git.schreifuchs.ch/lou-taylor/accounting/internal/email"
+	"github.com/caarlos0/env/v10"
 )
 
 // PDF holds the configuration for the PDF generator.
 type PDF struct {
-	Hostname string `json:"hostname"`
+	Hostname string `json:"hostname" env:"HOSTNAME"`
 }
 
 // Gitea holds the configuration for the Gitea client.
 type Gitea struct {
-	URL   string `json:"url"`
-	Token string `json:"token"`
+	URL   string `json:"url" env:"URL"`
+	Token string `json:"token" env:"TOKEN"`
 }
 
 // Config holds the configuration for the entire application.
 type Config struct {
-	Email email.Config `json:"email"`
-	PDF   PDF          `json:"pdf"`
-	Gitea Gitea        `json:"gitea"`
+	Email email.Config `json:"email" envPrefix:"EMAIL_"`
+	PDF   PDF          `json:"pdf" envPrefix:"PDF_"`
+	Gitea Gitea        `json:"gitea" envPrefix:"GITEA_"`
 }
 
-// Load loads the configuration from a JSON file.
+// Load loads the configuration from a JSON file and environment variables.
 func Load(path string) (*Config, error) {
+	cfg := &Config{}
+
 	file, err := os.Open(path)
-	if err != nil {
+	if err == nil {
+		defer file.Close()
+		decoder := json.NewDecoder(file)
+		if err := decoder.Decode(cfg); err != nil {
+			return nil, err
+		}
+	} else if !os.IsNotExist(err) {
 		return nil, err
 	}
-	defer file.Close()
 
-	cfg := &Config{}
-	decoder := json.NewDecoder(file)
-	if err := decoder.Decode(cfg); err != nil {
+	if err := env.Parse(cfg); err != nil {
 		return nil, err
 	}
 

internal/email/resource.go

@@ -8,15 +8,15 @@ import (
 )
 
 type Config struct {
-	SMTP SMTPConfig
-	From string
+	SMTP SMTPConfig `envPrefix:"SMTP_"`
+	From string     `env:"FROM"`
 }
 
 type SMTPConfig struct {
-	Host     string
-	Port     string
-	User     string
-	Password string
+	Host     string `env:"HOST"`
+	Port     string `env:"PORT"`
+	User     string `env:"USER"`
+	Password string `env:"PASSWORD"`
 }
 
 type Service struct {

main.go

@@ -1,22 +0,0 @@
-package main
-
-import (
-	"git.schreifuchs.ch/lou-taylor/accounting/internal/api"
-)
-
-func main() {
-	// var cfg invoice.Config
-	// file, err := os.Open("config.json")
-	// if err != nil {
-	// 	panic(err)
-	// }
-	// defer file.Close()
-	// decoder := json.NewDecoder(file)
-	// err = decoder.Decode(&cfg)
-	// if err != nil {
-	// 	panic(err)
-	// }
-	//
-	// invoice.Generate(cfg)
-	api.Start(":8080")
-}