Make CRM configurable through .env and part of realize config

.env.sample

@@ -1,2 +1,5 @@
 SAM_HTTP_ADDR=:3000
-SAM_DB_DSN=crust:crust@tcp(db1:3306)/crust?collation=utf8mb4_general_ci
+SAM_DB_DSN=crust:crust@tcp(localhost:3306)/crust?collation=utf8mb4_general_ci
+
+CRM_HTTP_ADDR=:3001
+CRM_DB_DSN=crust:crust@tcp(localhost:3306)/crust?collation=utf8mb4_general_ci

.realize.yaml

@@ -18,7 +18,7 @@ settings:
 server:
   status: false
 schema:
-- name: crust
+- name: sam
   path: cmd/sam
   commands:
     vet:
@@ -39,3 +39,24 @@ schema:
     - .git
     - .realize
     - vendor
+- name: crm
+  path: cmd/crm
+  commands:
+    vet:
+      status: true
+    test:
+      status: false
+    run:
+      status: true
+  args:
+  - api
+  watcher:
+    paths:
+    - .
+    - ../../crm
+    extensions:
+    - go
+    ignored_paths:
+    - .git
+    - .realize
+    - vendor

cmd/crm/main.go

@@ -9,11 +9,20 @@ import (
 	"net/http"
 
 	"github.com/go-chi/chi"
+	_ "github.com/joho/godotenv/autoload"
 
 	"github.com/crusttech/crust/crm/rest"
 	"github.com/titpetric/factory"
 )
 
+const (
+	defaultAddr = ":3000"
+	defaultDsn  = "crust:crust@tcp(db1:3306)/crust?collation=utf8mb4_general_ci"
+
+	envVarKey_HTTP_ADDR = "CRM_HTTP_ADDR"
+	envVarKey_DB_DSN    = "CRM_DB_DSN"
+)
+
 func handleError(err error, message string) {
 	if message == "" {
 		message = "Error making API call"
@@ -24,11 +33,23 @@ func handleError(err error, message string) {
 }
 
 func main() {
-	// set up flags
+	var envHttpAddr, envDbDsn string
+	var has bool
+
+	if envHttpAddr, has = os.LookupEnv(envVarKey_HTTP_ADDR); !has {
+		envHttpAddr = defaultAddr
+	}
+
+	if envDbDsn, has = os.LookupEnv(envVarKey_DB_DSN); !has {
+		envDbDsn = defaultDsn
+	}
+
 	var (
-		addr = flag.String("addr", ":3000", "Listen address for HTTP server")
-		dsn = flag.String("dsn", "crust:crust@tcp(db1:3306)/crust?collation=utf8mb4_general_ci", "DSN for database connection")
+		// set up flags
+		addr = flag.String("addr", envHttpAddr, "Listen address for HTTP server")
+		dsn  = flag.String("dsn", envDbDsn, "DSN for database connection")
 	)
+	println(*dsn)
 	flag.Parse()
 
 	// log to stdout not stderr