add gitpod config

.gitpod.yml

@@ -0,0 +1,26 @@
+image: nfcore/gitpod:latest
+
+tasks:
+  - before: |
+        wget -qO- get.nextflow.io | bash
+        chmod 777 nextflow
+        sudo mv nextflow /usr/local/bin/
+        pip install tiptop
+        pip install nf-core
+
+vscode:
+  extensions: # based on nf-core.nf-core-extensionpack
+    - codezombiech.gitignore                 # Language support for .gitignore files
+    # - cssho.vscode-svgviewer                 # SVG viewer
+    - davidanson.vscode-markdownlint         # Markdown/CommonMark linting and style checking for Visual Studio Code
+    - eamodio.gitlens                        # Quickly glimpse into whom, why, and when a line or code block was changed
+    - EditorConfig.EditorConfig              # override user/workspace settings with settings found in .editorconfig files
+    - Gruntfuggly.todo-tree                  # Display TODO and FIXME in a tree view in the activity bar
+    - mechatroner.rainbow-csv                # Highlight columns in csv files in different colors
+    # - nextflow.nextflow                      # Nextflow syntax highlighting
+    - oderwat.indent-rainbow                 # Highlight indentation level
+    - streetsidesoftware.code-spell-checker  # Spelling checker for source code
+
+ports:
+  - port: 3000
+    onOpen: open-preview