Add crg custom config file and update nfcore_custom.config

conf/crg.config

@@ -0,0 +1,14 @@
+//Profile config names for nf-core/configs
+params {
+  config_profile_description = 'Centre for Genomic Regulation (CRG) cluster profile provided by nf-core/configs'
+  config_profile_contact = 'Athanasios Baltzis (@athbaltzis)'
+  config_profile_url = 'http://www.linux.crg.es/index.php/Main_Page'
+}
+
+process {
+  executor = 'crg'
+}
+
+singularity {
+  enabled = true
+}

nfcore_custom.config

@@ -30,6 +30,7 @@ profiles {
   cfc_dev      { includeConfig "${params.custom_config_base}/conf/cfc_dev.config" }
   cheaha       { includeConfig "${params.custom_config_base}/conf/cheaha.config" }
   computerome  { includeConfig "${params.custom_config_base}/conf/computerome.config" }
+  crg        { includeConfig "${params.custom_config_base}/conf/crg.config" }
   crick        { includeConfig "${params.custom_config_base}/conf/crick.config" }
   crukmi       { includeConfig "${params.custom_config_base}/conf/crukmi.config" }
   czbiohub_aws { includeConfig "${params.custom_config_base}/conf/czbiohub_aws.config" }