diff --git a/admin/main.go b/admin/main.go
index 8f499c4b..523d8dd5 100644
--- a/admin/main.go
+++ b/admin/main.go
@@ -10,6 +10,7 @@ import (
 	"os/signal"
 	"path"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"syscall"
 
@@ -62,6 +63,8 @@ func StripPrefix(prefix string, h http.Handler) http.Handler {
 }
 
 func main() {
+	var err error
+	bind := "127.0.0.1:8081"
 	cloudDAVBase := ""
 	cloudUsername := "fic"
 	cloudPassword := ""
@@ -95,11 +98,53 @@ func main() {
 		baseURL = v
 	}
 	if v, exists := os.LookupEnv("FIC_4REAL"); exists {
-		api.IsProductionEnv = v == "true" || v == "on" || v == "TRUE" || v == "ON" || v == "1"
+		api.IsProductionEnv, err = strconv.ParseBool(v)
+		if err != nil {
+			log.Fatal("Unable to parse FIC_4REAL variable:", err)
+		}
+	}
+	if v, exists := os.LookupEnv("FIC_ADMIN_BIND"); exists {
+		bind = v
+	}
+	if v, exists := os.LookupEnv("FIC_TIMESTAMPCHECK"); exists {
+		api.TimestampCheck = v
+	}
+	if v, exists := os.LookupEnv("FIC_SETTINGS"); exists {
+		settings.SettingsDir = v
+	}
+	if v, exists := os.LookupEnv("FIC_FILES"); exists {
+		fic.FilesDir = v
+	}
+	if v, exists := os.LookupEnv("FIC_SYNC_LOCALIMPORT"); exists {
+		localImporterDirectory = v
+	}
+	if v, exists := os.LookupEnv("FIC_SYNC_LOCALIMPORTSYMLINK"); exists {
+		localImporterSymlink, err = strconv.ParseBool(v)
+		if err != nil {
+			log.Fatal("Unable to parse FIC_SYNC_LOCALIMPORTSYMLINK variable:", err)
+		}
+	}
+	if v, exists := os.LookupEnv("FIC_SYNC_GIT_IMPORT_REMOTE"); exists {
+		gitImporterRemote = v
+	}
+	if v, exists := os.LookupEnv("FIC_SYNC_GIT_BRANCH"); exists {
+		gitImporterBranch = v
+	}
+	if v, exists := os.LookupEnv("FIC_OPTIONALDIGEST"); exists {
+		fic.OptionalDigest, err = strconv.ParseBool(v)
+		if err != nil {
+			log.Fatal("Unable to parse FIC_OPTIONALDIGEST variable:", err)
+		}
+	}
+	if v, exists := os.LookupEnv("FIC_STRONGDIGEST"); exists {
+		fic.StrongDigest, err = strconv.ParseBool(v)
+		if err != nil {
+			log.Fatal("Unable to parse FIC_STRONGDIGEST variable:", err)
+		}
 	}
 
 	// Read parameters from command line
-	var bind = flag.String("bind", "127.0.0.1:8081", "Bind port/socket")
+	flag.StringVar(&bind, "bind", bind, "Bind port/socket")
 	var dsn = flag.String("dsn", fic.DSNGenerator(), "DSN to connect to the MySQL server")
 	flag.StringVar(&baseURL, "baseurl", baseURL, "URL prepended to each URL")
 	flag.StringVar(&api.TimestampCheck, "timestampCheck", api.TimestampCheck, "Path regularly touched by frontend to check time synchronisation")
@@ -169,7 +214,6 @@ func main() {
 	}
 
 	// Sanitize options
-	var err error
 	log.Println("Checking paths...")
 	if staticDir != nil && *staticDir != "" {
 		if sDir, err := filepath.Abs(*staticDir); err != nil {
@@ -265,7 +309,7 @@ func main() {
 	interrupt := make(chan os.Signal, 1)
 	signal.Notify(interrupt, os.Interrupt, syscall.SIGTERM)
 
-	app := NewApp(config, baseURL, *bind)
+	app := NewApp(config, baseURL, bind)
 	go app.Start()
 
 	// Wait shutdown signal
diff --git a/receiver/main.go b/receiver/main.go
index f7f34fdd..9c3d96b5 100644
--- a/receiver/main.go
+++ b/receiver/main.go
@@ -17,12 +17,37 @@ import (
 )
 
 func main() {
-	var bind = flag.String("bind", "127.0.0.1:8080", "Bind port/socket")
-	var prefix = flag.String("prefix", "/", "Request path prefix to strip (from proxy)")
-	var teamsDir = flag.String("teams", "./TEAMS/", "Base directory where find existing teams")
-	flag.StringVar(&settings.SettingsDir, "settings", "./SETTINGSDIST", "Base directory where read settings")
+	bind := "127.0.0.1:8080"
+	prefix := "/"
+	teamsDir := "./TEAMS/"
+	settings.SettingsDir = "./SETTINGSDIST"
+
+	// Read paremeters from environment
+	if v, exists := os.LookupEnv("FIC_BASEURL"); exists {
+		prefix = v
+	}
+	if v, exists := os.LookupEnv("FIC_RECEIVER_BIND"); exists {
+		bind = v
+	}
+	if v, exists := os.LookupEnv("FIC_SETTINGSDIST"); exists {
+		settings.SettingsDir = v
+	}
+	if v, exists := os.LookupEnv("FIC_STARTED_FILE"); exists {
+		startedFile = v
+	}
+	if v, exists := os.LookupEnv("FIC_SUBMISSIONS_DIRECTORY"); exists {
+		SubmissionDir = v
+	}
+	if v, exists := os.LookupEnv("FIC_TEAMS_DIRECTORY"); exists {
+		teamsDir = v
+	}
+
+	flag.StringVar(&bind, "bind", bind, "Bind port/socket")
+	flag.StringVar(&prefix, "prefix", prefix, "Request path prefix to strip (from proxy)")
+	flag.StringVar(&teamsDir, "teams", teamsDir, "Base directory where find existing teams")
+	flag.StringVar(&settings.SettingsDir, "settings", settings.SettingsDir, "Base directory where read settings")
 	flag.StringVar(&startedFile, "startedFile", startedFile, "Path to the file to create/remove whether or not the challenge is running")
-	flag.StringVar(&SubmissionDir, "submission", "./submissions/", "Base directory where save submissions")
+	flag.StringVar(&SubmissionDir, "submission", SubmissionDir, "Base directory where save submissions")
 	var simulator = flag.String("simulator", "", "Team to simulate (for development only)")
 	flag.StringVar(&staticDir, "static", staticDir, "Set to serve pages as well (for development only, use with -simulator)")
 	flag.Parse()
@@ -40,48 +65,48 @@ func main() {
 		}
 	}
 
-	*prefix = strings.TrimRight(*prefix, "/")
+	prefix = strings.TrimRight(prefix, "/")
 
 	// Load configuration
 	settings.LoadAndWatchSettings(path.Join(settings.SettingsDir, settings.SettingsFile), reloadSettings)
 
 	// Register handlers
-	http.Handle(fmt.Sprintf("%s/chname", *prefix), http.StripPrefix(fmt.Sprintf("%s/chname", *prefix), submissionTeamChecker{"name change", ChNameHandler, *teamsDir, *simulator}))
-	http.Handle(fmt.Sprintf("%s/issue", *prefix), http.StripPrefix(fmt.Sprintf("%s/issue", *prefix), submissionTeamChecker{"issue", IssueHandler, *teamsDir, *simulator}))
-	http.Handle(fmt.Sprintf("%s/openhint/", *prefix), http.StripPrefix(fmt.Sprintf("%s/openhint/", *prefix), submissionTeamChecker{"opening hint", HintHandler, *teamsDir, *simulator}))
-	http.Handle(fmt.Sprintf("%s/wantchoices/", *prefix), http.StripPrefix(fmt.Sprintf("%s/wantchoices/", *prefix), submissionTeamChecker{"wantint choices", WantChoicesHandler, *teamsDir, *simulator}))
-	http.Handle(fmt.Sprintf("%s/registration", *prefix), http.StripPrefix(fmt.Sprintf("%s/registration", *prefix), submissionChecker{"registration", RegistrationHandler}))
-	http.Handle(fmt.Sprintf("%s/resolution/", *prefix), http.StripPrefix(fmt.Sprintf("%s/resolution/", *prefix), ResolutionHandler{}))
-	http.Handle(fmt.Sprintf("%s/reset_progress", *prefix), http.StripPrefix(fmt.Sprintf("%s/reset_progress", *prefix), submissionTeamChecker{"reset_progress", ResetProgressHandler, *teamsDir, *simulator}))
-	http.Handle(fmt.Sprintf("%s/submission/", *prefix), http.StripPrefix(fmt.Sprintf("%s/submission/", *prefix), submissionTeamChecker{"submission", SubmissionHandler, *teamsDir, *simulator}))
+	http.Handle(fmt.Sprintf("%s/chname", prefix), http.StripPrefix(fmt.Sprintf("%s/chname", prefix), submissionTeamChecker{"name change", ChNameHandler, teamsDir, *simulator}))
+	http.Handle(fmt.Sprintf("%s/issue", prefix), http.StripPrefix(fmt.Sprintf("%s/issue", prefix), submissionTeamChecker{"issue", IssueHandler, teamsDir, *simulator}))
+	http.Handle(fmt.Sprintf("%s/openhint/", prefix), http.StripPrefix(fmt.Sprintf("%s/openhint/", prefix), submissionTeamChecker{"opening hint", HintHandler, teamsDir, *simulator}))
+	http.Handle(fmt.Sprintf("%s/wantchoices/", prefix), http.StripPrefix(fmt.Sprintf("%s/wantchoices/", prefix), submissionTeamChecker{"wantint choices", WantChoicesHandler, teamsDir, *simulator}))
+	http.Handle(fmt.Sprintf("%s/registration", prefix), http.StripPrefix(fmt.Sprintf("%s/registration", prefix), submissionChecker{"registration", RegistrationHandler}))
+	http.Handle(fmt.Sprintf("%s/resolution/", prefix), http.StripPrefix(fmt.Sprintf("%s/resolution/", prefix), ResolutionHandler{}))
+	http.Handle(fmt.Sprintf("%s/reset_progress", prefix), http.StripPrefix(fmt.Sprintf("%s/reset_progress", prefix), submissionTeamChecker{"reset_progress", ResetProgressHandler, teamsDir, *simulator}))
+	http.Handle(fmt.Sprintf("%s/submission/", prefix), http.StripPrefix(fmt.Sprintf("%s/submission/", prefix), submissionTeamChecker{"submission", SubmissionHandler, teamsDir, *simulator}))
 
 	if *simulator != "" {
-		if _, err := os.Stat(path.Join(*teamsDir, *simulator)); os.IsNotExist(err) {
-			log.Printf("WARNING: Team '%s' doesn't exist yet in %s.", *simulator, *teamsDir)
+		if _, err := os.Stat(path.Join(teamsDir, *simulator)); os.IsNotExist(err) {
+			log.Printf("WARNING: Team '%s' doesn't exist yet in %s.", *simulator, teamsDir)
 		}
 
 		// Serve team files
-		http.Handle(fmt.Sprintf("%s/wait.json", *prefix), http.StripPrefix(*prefix, http.FileServer(http.Dir(path.Join(*teamsDir, *simulator)))))
-		http.Handle(fmt.Sprintf("%s/my.json", *prefix), http.StripPrefix(*prefix, TeamMyServer{path.Join(*teamsDir, *simulator)}))
+		http.Handle(fmt.Sprintf("%s/wait.json", prefix), http.StripPrefix(prefix, http.FileServer(http.Dir(path.Join(teamsDir, *simulator)))))
+		http.Handle(fmt.Sprintf("%s/my.json", prefix), http.StripPrefix(prefix, TeamMyServer{path.Join(teamsDir, *simulator)}))
 
 		// Serve generated content
-		http.Handle(fmt.Sprintf("%s/teams.json", *prefix), http.StripPrefix(*prefix, http.FileServer(http.Dir(*teamsDir))))
-		http.Handle(fmt.Sprintf("%s/themes.json", *prefix), http.StripPrefix(*prefix, http.FileServer(http.Dir(*teamsDir))))
-		http.Handle(fmt.Sprintf("%s/stats.json", *prefix), http.StripPrefix(*prefix, http.FileServer(http.Dir(*teamsDir))))
-		http.Handle(fmt.Sprintf("%s/settings.json", *prefix), http.StripPrefix(*prefix, http.FileServer(http.Dir(settings.SettingsDir))))
+		http.Handle(fmt.Sprintf("%s/teams.json", prefix), http.StripPrefix(prefix, http.FileServer(http.Dir(teamsDir))))
+		http.Handle(fmt.Sprintf("%s/themes.json", prefix), http.StripPrefix(prefix, http.FileServer(http.Dir(teamsDir))))
+		http.Handle(fmt.Sprintf("%s/stats.json", prefix), http.StripPrefix(prefix, http.FileServer(http.Dir(teamsDir))))
+		http.Handle(fmt.Sprintf("%s/settings.json", prefix), http.StripPrefix(prefix, http.FileServer(http.Dir(settings.SettingsDir))))
 
 		// Serve static assets
-		http.Handle(fmt.Sprintf("%s/css/", *prefix), http.StripPrefix(*prefix, http.FileServer(http.Dir(staticDir))))
-		http.Handle(fmt.Sprintf("%s/js/", *prefix), http.StripPrefix(*prefix, http.FileServer(http.Dir(staticDir))))
+		http.Handle(fmt.Sprintf("%s/css/", prefix), http.StripPrefix(prefix, http.FileServer(http.Dir(staticDir))))
+		http.Handle(fmt.Sprintf("%s/js/", prefix), http.StripPrefix(prefix, http.FileServer(http.Dir(staticDir))))
 
-		http.Handle(fmt.Sprintf("%s/files/", *prefix), http.StripPrefix(*prefix, http.FileServer(http.Dir("FILES"))))
+		http.Handle(fmt.Sprintf("%s/files/", prefix), http.StripPrefix(prefix, http.FileServer(http.Dir("FILES"))))
 
 		// Serve index
-		http.HandleFunc(fmt.Sprintf("%s/edit", *prefix), serveIndex)
-		http.HandleFunc(fmt.Sprintf("%s/rank", *prefix), serveIndex)
-		http.HandleFunc(fmt.Sprintf("%s/register", *prefix), serveIndex)
-		http.HandleFunc(fmt.Sprintf("%s/rules", *prefix), serveIndex)
-		http.HandleFunc(fmt.Sprintf("%s/videos", *prefix), serveIndex)
+		http.HandleFunc(fmt.Sprintf("%s/edit", prefix), serveIndex)
+		http.HandleFunc(fmt.Sprintf("%s/rank", prefix), serveIndex)
+		http.HandleFunc(fmt.Sprintf("%s/register", prefix), serveIndex)
+		http.HandleFunc(fmt.Sprintf("%s/rules", prefix), serveIndex)
+		http.HandleFunc(fmt.Sprintf("%s/videos", prefix), serveIndex)
 	}
 
 	// Prepare graceful shutdown
@@ -89,7 +114,7 @@ func main() {
 	signal.Notify(interrupt, os.Interrupt, syscall.SIGTERM)
 
 	srv := &http.Server{
-		Addr:              *bind,
+		Addr:              bind,
 		ReadHeaderTimeout: 15 * time.Second,
 		ReadTimeout:       15 * time.Second,
 		WriteTimeout:      10 * time.Second,
@@ -100,7 +125,7 @@ func main() {
 	go func() {
 		log.Fatal(srv.ListenAndServe())
 	}()
-	log.Println(fmt.Sprintf("Ready, listening on %s", *bind))
+	log.Println(fmt.Sprintf("Ready, listening on %s", bind))
 
 	// Wait shutdown signal and touch timestamp
 	ticker := time.NewTicker(time.Second)
diff --git a/receiver/save.go b/receiver/save.go
index a0a98ab9..7db69280 100644
--- a/receiver/save.go
+++ b/receiver/save.go
@@ -9,7 +9,7 @@ import (
 	"path"
 )
 
-var SubmissionDir string
+var SubmissionDir = "./submissions/"
 var TmpSubmissionDir string
 
 func saveTeamFile(p string, w http.ResponseWriter, r *http.Request) bool {