Made the transcoder run as a periodic task, with the interval defined in the config TOML file

src/main/java/tech/bitgoblin/config/Config.java

@@ -4,6 +4,8 @@ import java.io.File;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Objects;
+
 import org.tomlj.Toml;
 import org.tomlj.TomlParseResult;
 import tech.bitgoblin.io.IOUtils;
@@ -28,6 +30,10 @@ public class Config {
     return this.result.getString(key);
   }
 
+  public int getInt(String key) {
+    return Objects.requireNonNull(this.result.getDouble(key)).intValue();
+  }
+
   public boolean contains(String key) {
     return this.result.contains(key);
   }