Add yet-another-react-lightbox package and update .gitignore to exclude node_modules

frontend/node_modules/ajv/lib/dot/defaults.def

@@ -1,47 +0,0 @@
-{{## def.assignDefault:
-  {{? it.compositeRule }}
-    {{
-      if (it.opts.strictDefaults) {
-        var $defaultMsg = 'default is ignored for: ' + $passData;
-        if (it.opts.strictDefaults === 'log') it.logger.warn($defaultMsg);
-        else throw new Error($defaultMsg);
-      }
-    }}
-  {{??}}
-    if ({{=$passData}} === undefined
-      {{? it.opts.useDefaults == 'empty' }}
-        || {{=$passData}} === null
-        || {{=$passData}} === ''
-      {{?}}
-    )
-      {{=$passData}} = {{? it.opts.useDefaults == 'shared' }}
-                         {{= it.useDefault($sch.default) }}
-                       {{??}}
-                         {{= JSON.stringify($sch.default) }}
-                       {{?}};
-  {{?}}
-#}}
-
-
-{{## def.defaultProperties:
-  {{
-    var $schema = it.schema.properties
-      , $schemaKeys = Object.keys($schema); }}
-  {{~ $schemaKeys:$propertyKey }}
-    {{ var $sch = $schema[$propertyKey]; }}
-    {{? $sch.default !== undefined }}
-      {{ var $passData = $data + it.util.getProperty($propertyKey); }}
-      {{# def.assignDefault }}
-    {{?}}
-  {{~}}
-#}}
-
-
-{{## def.defaultItems:
-  {{~ it.schema.items:$sch:$i }}
-    {{? $sch.default !== undefined }}
-      {{ var $passData = $data + '[' + $i + ']'; }}
-      {{# def.assignDefault }}
-    {{?}}
-  {{~}}
-#}}