Allow overriding the log level via the environment

Author: jkmassel

Sources/hostmgr/helpers/Logging.swift

@@ -21,8 +21,12 @@ extension Logger {
     static var shared = Logger(label: "com.automattic.hostmgr")
 
     static func initializeLoggingSystem() {
+
         #if DEBUG
         Logger.shared.logLevel = .trace
+        #else
+        let logLevelFromEnv = ProcessInfo.processInfo.environment["LOG_LEVEL"].flatMap { Logger.Level(rawValue: $0) }
+        Logger.shared.logLevel = logLevelFromEnv ?? .info
         #endif
 
         LoggingSystem.bootstrap { label in