Add container publishing and env-based runtime

main.go

@@ -147,7 +147,7 @@ func loadConfig() (Config, error) {
 	if err != nil {
 		return Config{}, fmt.Errorf("parse ALMA_UPCOMING_DAYS: %w", err)
 	}
-	almaCredsFile, err := readValue("ALMA_CREDS_FILE", "/config/alma.creds", true)
+	almaCredsFile, err := readValue("ALMA_CREDS_FILE", "/config/alma.creds", false)
 	if err != nil {
 		return Config{}, err
 	}
@@ -269,6 +269,20 @@ func splitCSV(value string) []string {
 }
 
 func loadAlmaCreds(filePath string) (map[string]string, error) {
+	if envUser, _ := readValue("ALMA_USERNAME", "", false); envUser != "" {
+		if envPass, _ := readValue("ALMA_PASSWORD", "", false); envPass != "" {
+			return map[string]string{
+				"username": envUser,
+				"password": envPass,
+			}, nil
+		}
+		return nil, errors.New("ALMA_PASSWORD is required when ALMA_USERNAME is set")
+	}
+
+	if filePath == "" {
+		return nil, errors.New("missing Alma credentials: set ALMA_USERNAME/ALMA_PASSWORD or ALMA_CREDS_FILE")
+	}
+
 	data, err := os.ReadFile(filePath)
 	if err != nil {
 		return nil, fmt.Errorf("read alma creds: %w", err)
@@ -291,13 +305,6 @@ func loadAlmaCreds(filePath string) (map[string]string, error) {
 		return nil, err
 	}
 
-	if envUser, _ := readValue("ALMA_USERNAME", "", false); envUser != "" {
-		values["username"] = envUser
-	}
-	if envPass, _ := readValue("ALMA_PASSWORD", "", false); envPass != "" {
-		values["password"] = envPass
-	}
-
 	if values["username"] == "" || values["password"] == "" {
 		return nil, errors.New("alma creds file must contain username and password")
 	}