Configuration via app.json

"mapapps_etl": {

      "MapappsETLTools": [
       {
          "fmeServerConfig": {
            "fmeServerUrl": "https://<FME Server URL>",
            "workspaceName": "<Workspace Name>.fmw",
            "repositoryName": "<Repository Name>",

            // deactivate to use the URL without the map.apps proxy. Required if the FME Server is called directly or via security.manager
            "useProxy": true,

            // true if uploads should be sent to a validation Workspace before continuing with the main process
            "useAnalyzeWorkspace": false,

            // analyzeWorkspace and hiddenAnalyzeColumns are only required if useAnalyzeWorkspace is set to true.
            // Has to be a Workspace in the same Repository as the main Workspace.
            "analyzeWorkspace": "<Analyze Workspace Name>.fmw",
            // Hide columns of the analysis for output in the result table, i.e. "coordinate_system", "format_long", "attributes", "geometry_types"
            "hiddenAnalyzeColumns": ["format_long"]
          },
          "fmeTool": {

            // can be an empty array or any of the given values. The parameter window is always shown if the parameters aren't hidden (see fmeParameterOpts.hiddenParameters)
            "inputs": [
              "upload", "extent", "mapfeatures"
            ],

            // in comparison to the inputs, only one output is allowed. Can be "map", "status" or "download"
            "output": "map",

            // specifiy width and height in pixels of the tool.
            "marginBox": {"w": 550, "h": 500, }
          },
          "fmeParameterOpts": {

            // list of FME Published Parameters. If all parameters of the Workspace are selected, the parameter dialog will be hidden.
            "hiddenParameters": [],

            "mapappsParameters": {
                // only required if the input methods is set to "extent". Can be "rectangle", "polygon", "polyline", "line" or "point"
                "extentType": "rectangle",

                // only required if the input method is set to "mapfeatures". Can be "rectangle" or "polygon"
                "mapSelectionExtentType": "rectangle",

                // only required if the input method is set to "upload" and analyze is configured. If false, feature types are collapsed/hidden initially.
                "showFeatureTypes": true,

                // optional for input method "upload". Allowed file extensions can specified as a comma separated list. If missing, all files will be allowed.
                "allowedFileExtensions": ".kml,.dwg",

                // optional: for input method "upload". Maximum file size in Mb.
                "maxUploadSize": "10",

                // optional: for output methods "status" and "download". The parameter opt_requestermail will be set to mandatory
                "emailIsMandatory": false,

                // optional: maximum number of features per layer allowed while drawing the result on the map. All excess features will be omitted
                "maxFeaturesPerLayer": 10000,

                // otpional: group layer name (visible in toc), defaults to "ETL"
                "groupLayerName": "Data Upload",

                // optional: popup type
                "popupType": "default"
            },

            // optional: the user has to accept the terms of use before starting the Workspace
            "acceptTermsOfUse":  false,

            // IDs of layers that should not be shown in the "Download features from map" dialog
            "mapFeaturesHiddenLayers": [
                "layerIdToBeHidden"
            ]

          },
          "title": "Tool Title",
          "tooltip": "Tooltip",
          "iconClass": "icon-upload",

          // tool id used to configure tool in the toolsets
          "id": "mapapps_tool_id",

           // optional: specify i18n values for each tool individually if necessary.
          "i18n": {
            "en": {
              "title": "Title - EN",
              "uploadExplanation": "Upload Explanation - EN",
              "uploadExplanationFooter": "Footer -EN",
              "extentExplanation": "Choose your area of interest on the map.",
              "mapFeaturesExplanation": "Choose layers from which vector graphics should be chosen. Then select elements on the map.",
              "furtherInformation": "Further information",

               // Error messages can be created from within the FME Workspace. Append your i18n strings here for custom error messages.
              "transformationErrors": {
                    "NO_FEATURE_WRITTEN": "The process didn't result in any outputs.",
                    "FILE_COULD_NOT_BE_READ": "The file ${0} could not be read.",
                    "TOO_MANY_FEATURES": "The maximum number of features for one layer was reached ${0}. Some features were omitted."
                }
            },
            "de": {
              "title": "Title - DE",
              "uploadExplanation": "Upload Erklärung - DE",
              "uploadExplanationFooter": "Footer - DE"
            }
          }
        }
    ]
}