Fix data races across session/forwarder/registry, resolve POST/PUT hang, harden port allocation, add frontendURL env (#157)

Reviewed-on: #157
Co-authored-by: Bagas <bagas@fossy.my.id>
Co-committed-by: Bagas <bagas@fossy.my.id>

internal/config/config.go

@@ -6,6 +6,7 @@ import (
 
 type Config interface {
 	Domain() string
+	FrontendURL() string
 	SSHPort() string
 
 	HTTPPort() string
@@ -50,6 +51,7 @@ func MustLoad() (Config, error) {
 }
 
 func (c *config) Domain() string            { return c.domain }
+func (c *config) FrontendURL() string       { return c.frontendURL }
 func (c *config) SSHPort() string           { return c.sshPort }
 func (c *config) HTTPPort() string          { return c.httpPort }
 func (c *config) HTTPSPort() string         { return c.httpsPort }

internal/config/loader.go

@@ -12,8 +12,9 @@ import (
 )
 
 type config struct {
-	domain  string
-	sshPort string
+	domain      string
+	frontendURL string
+	sshPort     string
 
 	httpPort  string
 	httpsPort string
@@ -49,6 +50,7 @@ func parse() (*config, error) {
 	}
 
 	domain := getenv("DOMAIN", "localhost")
+	frontendURL := getenv("FRONTEND_URL", "https://"+domain)
 	sshPort := getenv("PORT", "2200")
 
 	httpPort := getenv("HTTP_PORT", "8080")
@@ -89,6 +91,7 @@ func parse() (*config, error) {
 
 	return &config{
 		domain:            domain,
+		frontendURL:       frontendURL,
 		sshPort:           sshPort,
 		httpPort:          httpPort,
 		httpsPort:         httpsPort,