Add support to configure listen address

Author: longsleep

Dockerfile

@@ -29,6 +29,7 @@ ENV PC_CONFIG_PATH="" \
     PC_EMAIL_PORT="" \
     PC_EMAIL_USER="" \
     PC_EMAIL_PASSWORD="" \
+    PC_LISTEN_ADDR="0.0.0.0" \
     PC_PORT=8080 \
     PC_ASSETS_PATH=${WORKDIR}/assets \
     PC_TLS_CERT="" \

README.md

@@ -49,6 +49,7 @@ Starts a Padlock Cloud server instance
 #### Environment Variables, Flags, Configuration File Variables
 | Environment Variable | Flag                   | Configuration File   | Description                                  |
 |----------------------|------------------------|----------------------|----------------------------------------------|
+| `PC_LISTEN_ADDR`     | `--listen`             | `server.listen_addr` | Address to listen on                         |
 | `PC_PORT`            | `--port` | `-p`   | `server.port`        | Port to listen on                            |
 | `PC_ASSETS_PATH`     | `--assets-path`        | `server.assets_path` | Path to assets directory                     |
 | `PC_TLS_CERT`        | `--tls-cert`           | `server.tls_cert`    | Path to TLS certification file               |

padlockcloud/cli.go

@@ -290,6 +290,13 @@ func NewCliApp() *CliApp {
 			Name:  "runserver",
 			Usage: "Starts a Padlock Cloud server instance",
 			Flags: []cli.Flag{
+				cli.StringFlag{
+					Name: "listen-addr",
+					Usage: "Address to listen on",
+					Value: "",
+					EnvVar: "PC_LISTEN_ADDR",
+					Destination: &config.Server.ListenAddr,
+				},
 				cli.IntFlag{
 					Name:        "port, p",
 					Usage:       "Port to listen on",

padlockcloud/server.go

@@ -82,6 +82,8 @@ func (d *DataStore) Serialize() ([]byte, error) {
 type ServerConfig struct {
 	// Path to assets directory; used for loading templates and such
 	AssetsPath string `yaml:"assets_path"`
+	// Address to listen on
+	ListenAddr string `yaml:"listen_addr"`
 	// Port to listen on
 	Port int `yaml:"port"`
 	// Path to TLS certificate
@@ -580,11 +582,12 @@ func (server *Server) Start() error {
 
 	server.InitHandler()
 
+	listenAddr := server.Config.ListenAddr
 	port := server.Config.Port
 	tlsCert := server.Config.TLSCert
 	tlsKey := server.Config.TLSKey
 
-	server.Addr = fmt.Sprintf(":%d", port)
+	server.Addr = fmt.Sprintf("%s:%d", listenAddr, port)
 
 	// Start server
 	if tlsCert != "" && tlsKey != "" {