feat: use caarlos0/env for config

.gitignore

@@ -1 +1,2 @@
 build/*
+data

README.md

@@ -57,7 +57,7 @@ This will create the `registry` binary in the `build/` directory.
 
 Alternatively, run
 ```bash
-DATABASE_URL="mongodb://localhost:27017" ./build/registry 
+MCP_REGISTRY_DATABASE_URL="mongodb://localhost:27017" ./build/registry
 ```
 
 By default, the service will run on `http://localhost:8080`.
@@ -83,7 +83,7 @@ For development and testing purposes, the application includes a fake service wi
 1. Set the environment to "test":
 
 ```bash
-export APP_ENV=test
+export MCP_REGISTRY_ENVIRONMENT=test
 ./build/registry
 ```
 
@@ -183,19 +183,17 @@ Simple ping endpoint that returns environment configuration information:
 }
 ```
 
-
 ## Configuration
 
 The service can be configured using environment variables:
 
 | Variable | Description | Default |
 |----------|-------------|---------|
-| `APP_ENV` | Application environment (production, test) | `production` |
+| `MCP_REGISTRY_ENVIRONMENT`     | Application environment (production, test) | `production` |
-| `APP_VERSION`| Application version | `dev` |
+| `MCP_REGISTRY_APP_VERSION`     | Application version | `dev` |
-| `DATABASE_URL` | MongoDB connection string | `mongodb://localhost:27017` |
+| `MCP_REGISTRY_DATABASE_URL`    | MongoDB connection string | `mongodb://localhost:27017` |
-| `DATABASE_NAME` | MongoDB database name | `mcp-registry` |
+| `MCP_REGISTRY_DATABASE_NAME`   | MongoDB database name | `mcp-registry` |
-| `COLLECTION_NAME` | MongoDB collection name for server registry | `servers_v2` |
+| `MCP_REGISTRY_COLLECTION_NAME` | MongoDB collection name for server registry | `servers_v2` |
-
 
 ## Testing
 
@@ -215,4 +213,3 @@ You can specify specific endpoints to test:
 ## License
 
 See the [LICENSE](LICENSE) file for details.
-

go.mod

@@ -11,6 +11,7 @@ require (
 
 require (
 	github.com/KyleBanks/depth v1.2.1 // indirect
+	github.com/caarlos0/env/v11 v11.3.1 // indirect
 	github.com/go-openapi/jsonpointer v0.21.1 // indirect
 	github.com/go-openapi/jsonreference v0.21.0 // indirect
 	github.com/go-openapi/spec v0.21.0 // indirect

go.sum

@@ -1,5 +1,7 @@
 github.com/KyleBanks/depth v1.2.1 h1:5h8fQADFrWtarTdtDudMmGsC7GPbOAu6RVB3ffsVFHc=
 github.com/KyleBanks/depth v1.2.1/go.mod h1:jzSb9d0L43HxTQfT+oSA1EEp2q+ne2uh6XgeJcm8brE=
+github.com/caarlos0/env/v11 v11.3.1 h1:cArPWC15hWmEt+gWk7YBi7lEXTXCvpaSdCiZE2X5mCA=
+github.com/caarlos0/env/v11 v11.3.1/go.mod h1:qupehSf/Y0TUTsxKywqRt/vJjN5nz6vauiYEUUr8P4U=
 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/go-openapi/jsonpointer v0.21.1 h1:whnzv/pNXtK2FbX/W9yJfRmE2gsmkfahjMKB0fZvcic=

internal/config/config.go

@@ -1,56 +1,26 @@
 package config
 
-import "os"
+import (
+	"github.com/caarlos0/env/v11"
+)
 
 // Config holds the application configuration
 type Config struct {
-	ServerAddress  string
+	ServerAddress  string `env:"MCP_REGISTRY_SERVER_ADDRESS" envDefault:":8080"`
-	DatabaseURL    string
+	DatabaseURL    string `env:"MCP_REGISTRY_DATABASE_URL" envDefault:"mongodb://localhost:27017"`
-	DatabaseName   string
+	DatabaseName   string `env:"MCP_REGISTRY_DATABASE_NAME" envDefault:"mcp-registry"`
-	CollectionName string
+	CollectionName string `env:"MCP_REGISTRY_COLLECTION_NAME" envDefault:"servers_v2"`
-	LogLevel       string
+	LogLevel       string `env:"MCP_REGISTRY_LOG_LEVEL" envDefault:"info"`
-	Environment    string // Added environment field
+	Environment    string `env:"MCP_REGISTRY_ENVIRONMENT" envDefault:"production"`
-	Version        string // Application version
+	Version        string `env:"MCP_REGISTRY_VERSION" envDefault:"dev"`
 }
 
 // NewConfig creates a new configuration with default values
 func NewConfig() *Config {
-	// Get environment from OS environment variable or default to "production"
+	var cfg Config
-	env := os.Getenv("APP_ENV")
+	err := env.Parse(&cfg)
-	if env == "" {
+	if err != nil {
-		env = "production"
+		panic(err)
-	}
-
-	// Get version from environment variable or default to "dev"
-	version := os.Getenv("APP_VERSION")
-	if version == "" {
-		version = "dev"
-	}
-
-	// Get database URL from environment variable or default to localhost
-	dbURL := os.Getenv("DATABASE_URL")
-	if dbURL == "" {
-		dbURL = "localhost:5432"
-	}
-
-	// Get database name from environment variable or default to "mcp_registry"
-	dbName := os.Getenv("DATABASE_NAME")
-	if dbName == "" {
-		dbName = "mcp-registry"
-	}
-	// Get collection name from environment variable or default to "entries"
-	collectionName := os.Getenv("COLLECTION_NAME")
-	if collectionName == "" {
-		collectionName = "servers_v2"
-	}
-
-	return &Config{
-		ServerAddress:  ":8080",
-		DatabaseURL:    dbURL,
-		DatabaseName:   dbName,
-		CollectionName: collectionName,
-		LogLevel:       "info",
-		Environment:    env,
-		Version:        version,
 	}
+	return &cfg
 }